If you have a node that reads or computes some X-Y data, you can add axis
labels and a title to your clipboard plot by protecting the *[labels]*
section with and "@" directive. This causes the following text to be
ignored when the script is executed by CNTL-B of with VR3, but it does not
hide the section from the plot clipboard command. Here is an example.
Let's read annual global surface temperature from a file, then plot it.
The file will contain rows like this:
1900 0.395
1901 0.438
# etc.
The code and the *[labels] *section could look like this:
import pyperclip
datafile = r'c:\data\sst.txt'
with open(datafile) as file:
data = file.read()
pyperclip.copy(data)
@
[labels]
title = Global Surface Temperature Vs Year
xaxis = Year
yaxis = "Global Average Surface Temperature, Deg C.
When you run this node, say with CTRL-B, the file will be read and its
contents copied to the clipboard. When you invoke the plotting command,
the data in the clipboard will be plotted, and the graph's title and axis
labels will be taken from the *[labels]* section of the node. The "@"
directive prevents the section from being interpreted as code.
On Monday, November 8, 2021 at 8:10:42 PM UTC-5 [email protected] wrote:
> I have adapted the code for Viewrendered3's new ability to plot data in
> nodes, and with minor changes it functions as a stand-alone command to take
> data from the clipboard and plot it. So if you get one- or two-column data
> into the clipboard you can take a quick look at it.
>
> Here is an example of X-Y data:
>
> 1 1
> 2 .5
> 3 -6
> # comment
> ; comment
>
> 4 -16
> 5 -2
> 6 5
> 7 10
>
> Non-numeric lines are ignored except for special configuration sections,
> so you can copy a large range of data sources and plot them instantly. You
> could also do some computation in a node that you run with CTRL-B, and add
> a few lines to format it and copy it to the clipboard. I have found that
> ability to be very useful while I've developed code. The script is very
> flexible and robust (so far as I know, anyway).
>
> You do need to install *pyperclip* (for getting the clipboard), and
> *matplotlib* to do the actual plotting - you probably have it installed
> already. You could change the script to use Leo's own clipboard code or
> some other clipboard package; I just happen to like pyperclip and think
> it's easy to use.
>
> As of this evening, the script is in *scripts.leo* in the *devel*
> branch, under a new node with the headline *Plots and Graphs*. More
> information and usage details are in the docstring of the script, and the
> new *Help for plot-2d* menu item in VR3 is very applicable since the code
> is largely the same.
>
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