Re: [Veusz-discuss] Feature suggestion: multiple plots with offset

[Steve Richardson]

I do this by creating a variable (Edit -> Custom Definitions) called dy. Then 
(for datasets f1, f2, etc) I make the Y data for my plots f1 + 1*dy, f2 + 2*dy, 
etc. The vertical offset can then be easily changed by changing the value of 
dy. 

Steve

> On May 13, 2016, at 10:00 AM, Bernd Maier  wrote:
> 
> Dear Jeremy,
> 
> sometimes it is useful to plot different datasets of the same type on
> top of each other with a given gap or offset between each single plot
> (e.g. a series of powder diffraction patterns). To the best of my
> knowledge this can be achieved in Veusz right now with three approaches:
> (1) arrange graphs in a grid which doesn't look nice.
> (2) several y-axes for each plot with different positions for each axis.
> (3) multiply each dataset by a constant and plot all in the same
> xy-plot.
> 
> Option three gives exactly what I want, but it is a bit tedious to
> adjust the offsets manually for each plot.
> 
> So, it would be a nice feature to have a "multiple plots widget" which
> can take any number of datasets and plot them with an adjustable offset
> on the vertical (and/or horizontal) axis.
> 
> Any thoughts on this? Maybe I have overlooked a more simple solution
> already existing?
> 
> Thank you very much, especially for this great plotting program!!
> 
> All the best,
> Bernd
> 
> ___
> Veusz-discuss mailing list
> Veusz-discuss@gna.org
> https://mail.gna.org/listinfo/veusz-discuss

___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] monitoring live data

[Steve Richardson]

You can use slicing with negative indices to plot only the last bit of some 
datasets. Eg, plot x[-10:] vs y[-10:]. This will plot just the last 10 elements 
in the datasets x and y. Perhaps something like this can work for you?

Steve


> On Oct 18, 2015, at 11:31 AM, Carl Wolff  wrote:
> 
> Hello,
> 
> I like to use Veusz for monitoring live data (update interval 1 sec, 
> maximal 10 separate figures to monitor). In this case Veusz must show the 
> actual figures and previous values over some timewindow (e.g. one hour). 
> Data older than the timewindow is to be disregarded.
> 
> Is this possible with Veusz? I think I have to write a plugin, or embed 
> Veusz in our python data acquisition package.
> 
> Best regards,
> Carl.
> 
> 
> ___
> Veusz-discuss mailing list
> Veusz-discuss@gna.org
> https://mail.gna.org/listinfo/veusz-discuss

___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] Accidentally Scrolling in Drop Down Boxes

[Steve Richardson]

I think that this behavior can be changed by setting the widget FocusPolicy to 
StrongFocus instead of WheelFocus. This would require that the widget be 
clicked or selected using the tab key, before it accepts input. With 
WheelFocus, the widget is activated by mouse scroll wheel actions, which causes 
the accidental scrolling in the drop down boxes. 

Steve 

> On Oct 2, 2015, at 9:34 AM, Dawes, Andrew M.  wrote:
> 
> This scrolling in the pull-down menu also happens on the Mac, and I’ve had to 
> learn to scroll carefully in the settings pane. If there were a way to 
> disable it, I would be very interested. My guess is somewhere inside Qt since 
> that is generating the widgets etc.
> 
> Andy
> 
>> On Oct 2, 2015, at 3:52 AM, Andre Scholich  wrote:
>> 
>> Hi Simon,
>> 
>> it may also be related to the peculiar scrolling behaviour in Windows in 
>> general. You could try either WhizMouse or KatMouse.
>> In Windows 10 it seems to be built in now: 
>> http://www.groovypost.com/howto/scroll-inactive-background-windows-by+hovering-over-them/
>> 
>> Best,
>> Andre
>> 
>>> On Fri, Oct 2, 2015 at 10:10 AM, Simon Kleinknecht 
>>>  wrote:
>>> Thanks for the fast reply. Scrolling is possible in any theme working on
>>> Windows. They seem to only change the appearance but not the window
>>> behavior. I guess I simply have to be more careful with the scroll wheel
>>> :-).
>>> 
>>> Simon
>>> 
>>> On 2015-10-02 09:59 AM, Jeremy Sanders wrote:
>>> > On 02/10/15 09:26, Simon Kleinknecht wrote:
>>> >
>>> >> I noticed this on my Windows 8.1 (Veusz 1.23.1), so I guess I cannot
>>> >> change any theme or behavior. I checked it again and it's possible to
>>> >> scroll through values in every list in the Formatting and Properties
>>> >> windows.
>>> >
>>> > It is possible to change this from the veusz console, if you want to see
>>> > whether other themes are better. At the console type
>>> >
>>> > import veusz.qtall as qt
>>> > qt.qApp.setStyle(qt.QStyleFactory.create("XXX"))
>>> >
>>> > where XXX is the style, which on Windows (for me) allows Windows,
>>> > WindowsXP, WindowsVista, Motif, CDE, Plastique and Cleanlooks as valid
>>> > options.
>>> >
>>> > Jeremy
>>> >
>>> 
>>> --
>>> ___
>>> 
>>>  Simon Kleinknecht, Dipl.-Ing. Umweltschutztechnik
>>>  Institut fuer Wasser- und Umweltsystemmodellierung
>>>  Versuchseinrichtung zur Grundwasser- und Altlastensanierung (VEGAS)
>>>  Universitaet Stuttgart
>>>  Pfaffenwaldring 61
>>>  D-70569 Stuttgart
>>> 
>>>  Tel: (0049) 711/685-68201
>>>  http://www.vegas.uni-stuttgart.de
>>> 
>>> ___
>>> Veusz-discuss mailing list
>>> Veusz-discuss@gna.org
>>> https://mail.gna.org/listinfo/veusz-discuss
>> 
>> ___
>> Veusz-discuss mailing list
>> Veusz-discuss@gna.org
>> https://mail.gna.org/listinfo/veusz-discuss
> 
> ___
> Veusz-discuss mailing list
> Veusz-discuss@gna.org
> https://mail.gna.org/listinfo/veusz-discuss
___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] Merge two veusz files

[Steve Richardson]

I'm not sure what append does in origin, but you can copy pages or graphs 
from one veusz file and paste them in another. 

Steve


 On Mar 25, 2015, at 12:52 PM, Yin, Weiguo w...@bnl.gov wrote:
 
 Hello,
  
 I’m new to Veusz and already found it’s delightful to use. I‘d like to ask
  
 How can one merge two Veusz files into one, like the “Append” function in 
 Origin by OriginLab which I frequently used?
  
 Best regards,
  
 Weiguo
 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss
___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] data values on bars

[Steve Richardson]

I've done something similar by using an xy points plot with markers set to
none, but with labels set to the text I wanted to appear. Note that
hiding the markers doesn't work because that hides the labels too.

On Mon, Dec 15, 2014 at 7:22 AM, Jeremy Sanders jer...@jeremysanders.net
wrote:

 On 12/12/14 23:38, Birger Ilau wrote:

  I need the bottom of each bar (under the x-axis) to have a label
 (defined as a dataset names), I can do that by going /x-axis
 properties - mode - labels/ and then defining labels from /bar
 properties - labels - names/. So far it works fine. But now I need
 data values (y-axis values) on top of each bar and I can not find a way
 to do that. Only way to see data values on each bar is to put them
 instead of my name labels under the x-axis, but I'm sure there's a way
 to do it properly.


 I don't know of an obvious way to do this. However, you could add a label
 widget to the plot if you can calculate x and y coordinates for the labels
 (these can be datasets), use your numerical dataset for Label and set the
 position mode to axes.

 Hope this helps

 Jeremy


 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss



labels.vsz
Description: Binary data
___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] Having some py2app issues

[Steve Richardson]

Jeremy,

Thanks for the reply.

I do have a strip executable, so I don't know why this is not working.
It's not a huge issue, so I'll see if I can eventually figure it out when I
get some time.

Thanks for pointing me to the scripts you use for making executables. I had
not realized they were in the source. After modifying the paths for my
machine, these scripts have fixed the icon problem for me.

Steve




On Mon, Jul 21, 2014 at 3:12 PM, Jeremy Sanders jer...@jeremysanders.net
wrote:

 Hi Steve


 On 21/07/14 15:09, Steve Richardson wrote:

 I’ve just started trying to package up veusz (github version) into an
 app bundle on a Mac. I’ve downloaded a fresh copy of the source, and
 issued the command:

 python setup.py py2app

 Everything seems to go ok until I get to the part where symbols are
 being stripped from the compiled libraries. This seems to proceed ok
 (i.e., I get messages like stripping QtGui), until I hit “stripping
 h5t.so”, where I get the error

 sh: line 1:  2571 Trace/BPT trap: 5
 /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -sdk /
 -find strip 2 /dev/null
 strip: error: unable to find utility strip, not a developer tool or in
 PATH
 stripping saved 0 bytes (165071296 / 165071296)

 Is this something that anyone else encountered? I’m thinking that it may
 be specific to my system, due to versions of libraries installed or
 something.


 Are you missing some part of the command line utilities to go with xcode?
 Do you have a strip executable?

 I use the scripts here to make py2app executables. They will need some
 modification of paths:

 https://github.com/jeremysanders/veusz/blob/master/scripts/make-veusz-
 image.sh
 https://github.com/jeremysanders/veusz/blob/master/scripts/fixup_veusz_
 dist.sh

 The blank icons are caused by the lack of the svg image/icon qt plugins.
 My scripts above make a qt.conf and hack the paths in the plugins to point
 to the libraries in the app.

 Jeremy


___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] HDF5 support badly needed

[Steve Richardson]

The import_improvements branch works with my HDF5 files. I don't have any
files with tables, though, so I didn't test that.

Steve


On Mon, Dec 23, 2013 at 11:35 AM, Jeremy Sanders
jer...@jeremysanders.netwrote:

 On 12/17/2013 12:46 PM, Jeremy Sanders wrote:

  It probably won't be hard to support compound data types in my import
 filter - I can treat them similarly to groups. I didn't find any example
 files which used them, so I haven't bothered so far. I need to make the
 code which walks the file understand that the V datatype has different
 components.


 Ok, I have now a largely complete HDF import. It supports tables (compound
 data types), groups, importing as dates, 2d data with x/y ranges, slicing
 before importing and error bars (using 1d or 2d datasets). Most of these
 options can be set in the UI or as HDF attributes. I've also updated the
 manual source.

 It hasn't had much testing, so if you have HDF5 files, please try it out
 from the import_improvements branch. I should add some self tests.


 Jeremy


 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss

___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] HDF5 support badly needed

[Steve Richardson]

Jeremy,

I just tried the new version, and the HDF5 import seems to be working for
me.

There is an additional feature that I think would be very useful.
Specifically, it would be great if it were possible to specify custom
slicing of the HDF5 dataset. I.e., if it were possible to specify custom
start:stop:skip indices for the datasets. This would allow users to import
only a specific subset of the data from the HDF5 dataset, which would be
quite useful for very large HDF5 files.

This could potentially also allow users to import lower dimensional subsets
of the data in HDF5 files. E.g., to get a 1D slice out of a 2D dataset, or
a 2D slice from a higher-dimension data set. For example, I have HDF5 files
with electric and magnetic fields specified on a 3D grid. Since these are
vector fields, they have an additional index which specifies the component
of the field. Thus the HDF5 dataset is actually 4D. I'd love to be able to
get 1D or 2D subsets out of this dataset for plotting.

I'm pretty new to Qt programming, but I'm going to try and see if I can
extend the HDF5 import tab to include the necessary pieces for permitting
custom slicing.

Steve



On Sun, Dec 8, 2013 at 12:29 PM, Jeremy Sanders jer...@jeremysanders.netwrote:

 On 04/12/13 22:06, J Lister wrote:

 I'm really needing some HDF5 read in support in this. I know many
 aerospace engineers that would enjoy using this package, but cannot due
 their data being in HDF5. I would be happy to work on a plug-in or
 something, but I need more direction.


 Ok, I've added some initial HDF support using h5py. The implementation is
 inspired by Volker's, but it has the ability to import groups of datasets
 (under their original names) and individual datasets with any name. I think
 the dialog box works fairly nicely.

 Error bar support is currently implemented by using dataset names foo
 (+), foo (-) or foo (+-) for datasets to add error bars to dataset foo.

 You can also provide error bars with a 2D dataset using 2 or 3 columns. In
 that case you should give your dataset name bar (1D).

 2D datasets work, but there's no way to provide the x and yrange yet.
 Maybe some syntax for the name like bar (xrange=1:2,yrange=1:2) would
 work, or I could allow special attributes. 1D text datasets also work.

 I don't have support for date datasets - I'm not sure how this should be
 done yet.

 It's pretty untested, but if you'd like to give it a try get it from the
 import_improvement branch:
 https://github.com/jeremysanders/veusz/tree/import_improvement

 Jeremy



 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss

___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] HDF5 support badly needed

[Steve Richardson]

From Chapter 2 of the book Python and HDF5 by Andrew Collette:

HDF5 and h5py

We’ll use the “h5py” package to talk to HDF5. This package contains
high-level wrappers for the HDF5 objects of files, groups, datasets, and
attributes, as well as extensive low-level wrappers for the HDF5 C data
structures and functions. The examples in this book assume h5py version
2.2.0 or later, which you can get at http://www.h5py.org.

You should note that h5py is not the only commonly used package for talking
to HDF5. PyTables is a scientific database package based on HDF5 that adds
dataset indexing and an additional type system. Since we’ll be talking
about native HDF5 constructs, we’ll stick to h5py, but I strongly recommend
you also check out PyTables if those features interest you.

This makes me think that h5py is probably the better package to use in
Veusz, since it sounds like PyTables implements a lot of stuff on top of
plain vanilla HDF5.

Steve



On Thu, Dec 5, 2013 at 11:02 AM, Jeremy Sanders jer...@jeremysanders.netwrote:

 Dear all

 I'm currently reworking the import code (started yesterday, actually). I'm
 trying to reorganise it so that all the code is defined in one place (i.e.
 the Operation class, the LinkedFile class, the command line command
 [necessary for saved files] and the code for the import dialog). This
 should make it much easier to write or experiment with a non-plugin import.
 Plugin imports are generally ok, except you don't have much user interface
 flexibility. Maybe the new code should work in a week or two (see my
 import_improvement branch, which doesn't work yet).

 If I were to write some code, I'd like to know exactly what you'd like to
 get out of the HDF file (as Steve says). It would be very helpful to have
 some example files, and some idea what you'd like to get out of the file.
 I've never used the format, so it's hard to know what common operations
 should be and how to streamline the UI.

 Also, if anyone has experience reading HDF5 in Python, which is the better
 python module to use?

 Thanks

 Jeremy



 On 05/12/13 16:09, Steve Richardson wrote:

 Hi,

 I've found that making custom data import plugins for Veusz is pretty
 easy. My method consists of two parts:

 1) Write python code that reads your data format. Get this working as a
 standalone python script. Doing this first, and separate from any Veusz
 coding, lets you find and fix bugs easily.
 2) Write the Veusz plugin for your data format, following the example at
 http://barmag.net/veusz-wiki/ImportPlugins as a guide. This code will
 call the functions/classes you wrote in step 1.

 I've done this for a few custom data formats that I work with.

 There are several issues that you will probably encounter with HDF5. It
 is a very flexible file format, which is good for data storage, but will
 make it harder for you to write code to read your files. There are
 several python modules that can help; I'd take a look at
 http://www.h5py.org and http://www.pytables.org since they both use HDF5.

 Regardless of what approach you take, there will probably end up being
 some limitations with what you can do with HDF5. Without getting into
 the guts of Veusz (to define new data formats), you will probably not be
 able to do things with HDF5 that would be useful for large datasets.
 E.g., from the h5py site, one of the features is being able to slice
 multi-terabyte datasets stored on disk, as if they were real NumPy
 arrays. I'd love to be corrected, but I don't think you will be able to
 do that with a Veusz plugin.

 As I get some time, I'll probably take a shot at making a simple HDF5
 plugin, since it would be useful for me, too. If I come up with
 anything, I'll be sure to share it.

 Steve


 On Wed, Dec 4, 2013 at 4:06 PM, J Lister jonathan.lister@us.af.mil
 mailto:jonathan.lister@us.af.mil wrote:

 I'm really needing some HDF5 read in support in this. I know many
 aerospace engineers that would enjoy using this package, but cannot
 due
 their data being in HDF5. I would be happy to work on a plug-in or
 something, but I need more direction.


 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org mailto:Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss





 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss



___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] 2D datasets: irregular pixel sizes

[Steve Richardson]

Hi Jeremy,

This would be a very useful new feature! I haven't though a lot about this,
but specifying the edge values would be the most useful to me. I sometimes
need to plot 2D histogram data, and I already have the edges of each bin.
The color of the pixel would then correspond to the number of points in
that particular 2D bin.

As to how to compute the center, I think all you could do is assume the
center is in the middle. If the user wants log-spaced data, then they can
pre-compute the log values, and specify those as the bin edges. They could
then put custom labels on the axis if they want it to look like a log plot.
Does this make sense?

So the pylab module in matplotlib has a class for plotting nonuniform
images. (See
http://matplotlib.org/examples/pylab_examples/image_nonuniform.html) It
works by specifying the centers. I'm not sure how it computes the edges (or
pixel widths).

I'd be happy to do some beta testing of this feature once it is working.
I'm looking forward to seeing it in a future version of Veusz.

Steve



On Sun, Dec 1, 2013 at 12:07 PM, Jeremy Sanders jer...@jeremysanders.netwrote:

 I've written some code which didn't make it into 1.19/1.19.1, designed to
 make 2D datasets more general. The idea is to allow a more general dataset
 where the y and x steps can vary to give different sized pixels. This is
 really useful if your data are logarithimically defined, etc.

 The current implementation is that the user provides edges where the
 pixels start and stop (the next starts where the previous stops). The user
 provides a list of x and y values which contain 1+number of values in that
 direction.

 This seemed to be reasonable and is a good fit for image type widgets,
 where the edge of the image needs to be properly defined. However, there
 some issues:

 1. The contour widget needs to know where the pixel centres are. If you
 have the edges, you need to assume that the centre is in the middle. This
 might not be the case for log-stepped data (it's hard to do a log centre as
 the widget doesn't really know whether it is log or not).

 2. I was investigating making the CSV import able to read 2D data. You
 might want to have data like this, where the first row and first column are
 x and y values.

1,  10, 100,1000,1
 0, 1,  2,  3,  4,   5
 1, 2,  4,  5,  6,   3
 3, 3,  1,  0,  2,   3

 This again has the issue that the centres are what are defined and not the
 edges.

 Are pixel centres or edges the right way to describe 2D data? Centres seem
 better for contours, edges for images. Should veusz support both kinds of
 data? If centres are given, how do we calculate edges, and vice-versa?

 Jeremy

 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss

___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] Using the Embed feature with contours

[Steve Richardson]

You have to first call SetData2D to create a veusz dataset, and then use
the newly created dataset in the g.Set command in place of Bz.

Steve


On Thu, Jun 6, 2013 at 2:09 PM, Steve Swanekamp 
steve.swanek...@nrl.navy.mil wrote:

  Hello,

 I have a large number of files that contain electric and magnetic field
 data from different times from a PIC simulation of a plasma.  I have been
 successful at teaching Veusz to read in the data and do a contour plot of a
 single frame but now I want to automate the process in python.  I have been
 able to read the data into python but plotting it has been problematic.   I
 am using the embed feature of Veusz (which I have successfully used for x-y
 plots before) and ran into the following error when trying to make the
 contours

 # Make contours

 g.To('/page1/graph1/contour1')

 g.Set('data', Bz)

  Traceback (most recent call last):

 File U:\veusz\contour_movie.py, line 60, in module

 g.Set('data', Bz)

 File C:\Program Files\Veusz\embed.py, line 62, in runner

 g.To('/page1/graph1/image1')

 File C:\Program Files\Veusz\embed.py, line 301, in runCommand

 return self.sendCommand( (self.winno, cmd, args[1:], args2) )

 File C:\Program Files\Veusz\embed.py, line 292, in sendCommand

 retobj = cPickle.loads(rets)

 ImportError: No module named veusz.setting.setting


 The numpy array Bz contains the 513x513 array that I would like to image.
 Am I doing something wrong?  Any help would be greatly appreciated.

 Steve Swanekamp
 Plasma Physics Division
 Naval Research Laboratory
 Washington, DC

 ___
 Veusz-discuss mailing list
 Veusz-discuss@gna.org
 https://mail.gna.org/listinfo/veusz-discuss


___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

[Veusz-discuss] Step plots with error bars

[Steve Richardson]

Hi folks,

I'm trying to make step plots with error bars.  Everything seems to be
working well, except that I need to format the plot line to have
Steps=right, because that's how my data is formatted.  When I choose
this option, the steps are updated correctly, but the error bars are
still drawn at the original points.  If I choose Steps=center, then
the plot looks correct, with the error bars plotted at the center of
the step.  I've attached a veusz file and plot showing this.

I know that I can create a new dataset with shifted x values, so that
I can use Steps=center.  I'd rather not have to do that, though, since
I have quite a lot of data to plot.  Does anyone know of a better way
to create this plot?  Or perhaps the error bar plotting function
should be updated to check the value of the Steps formatting
parameter?

Thanks,

Steve
attachment: steps_errorbars.png

steps_errorbars.vsz
Description: Binary data
___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

Re: [Veusz-discuss] Integrate a dataset?

[Steve Richardson]

Hi Jeremy,

I put together a plugin for doing the integration, based on the
DatasetPlugin example on your website.  I'd be happy for you to
distribute this under the Veusz license.

Perhaps there could be a Calculus submenu under Operations, which
would have this, and maybe a numerical derivative operation.

Steve



On Thu, Jun 28, 2012 at 9:23 AM, Jeremy Sanders
jer...@jeremysanders.net wrote:
 On 28/06/12 14:20, Jeremy Sanders wrote:
 On 27/06/12 16:27, Steve Richardson wrote:
 Hi,

 I have a 1D dataset which I would like to integrate numerically and
 then plot.  Is this possible in Veusz?  I checked in Data-Operations,
 but didn't see anything like that.

 Numpy has a trapz function which does trapezoid integration. You should
 be able to use the create dataset dialog with an expression like

 By the way, the next release has a cumulative sum plugin which would
 almost be an integration for a fixed bin width (if the bin width is small!).

 Jeremy




integrateplugin.py
Description: Binary data
___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss

[Veusz-discuss] Integrate a dataset?

[Steve Richardson]

Hi,

I have a 1D dataset which I would like to integrate numerically and
then plot.  Is this possible in Veusz?  I checked in Data-Operations,
but didn't see anything like that.

If there is no way to do this as of yet, I'm thinking that I'll try to
write a Dataset Plugin, which would integrate a function using the
trapezoidal rule.  If I do write such a plugin, is there any way to
post it so that others can use it, too?

Thanks,

Steve

___
Veusz-discuss mailing list
Veusz-discuss@gna.org
https://mail.gna.org/listinfo/veusz-discuss