Peter, Thanks for your reply, but I am not sure that it will work in my case. I have a min and max ranges of data, which I want to enforce. My problem is not with data that lies outside of this range, but enforcing those min and max for data that lies inside the range.
Maybe an example is in order: lets say I have data that is constant throughout of 0.5, and a min and max of 0 and 1, respectively. If I attach the data field to Colormap, then 0.5 becomes the min and max and the image shows nothing. I would like the min and max to be respected, and the image showing a 0.5 opacity and saturation. This is how AutoGreyScale works, but it does not give you a color option. Is there a way to colorize the AutoGreyScale results? Thanks for your help, Brent On Fri, 2004-12-17 at 00:02, Peter Connolly wrote: > I had a similar issue: the colouring of data outside the range of my > arbitary min and max. By default, you get no colour, or an optional out > of range colour (an aside: the out of range is good but would be better > if you could specify different colours for max and min!). > > My solution was to use compute to limit the data to the arbitary min and > max values (data >= max ? max : data <= min ? min : data). > > That way, the colouring modules don't anything about the data outside > the colouring range, since it no longer exists in the data field. Use > route/switch to pass into multiple instances of this. I think this would > work for saturation and opacity as well. If you want the saturation and > opacity from the original data, pass in the original otherwise pass in > the output of the compute. > > Hope that helps > > Peter > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Brent > Bailey > Sent: 17 December 2004 01:08 > To: DX > Subject: Re: [opendx-users] ColoBar adjusts color > > > I am having a similar problem, but haven't found a satisfactory solution > yet. I want to set the minimum and maximum values, but I also want to > have it interpolate the saturation and opacity from the data inputs. > When I don't connect the data input, I get nothing (the data has no > effect on the saturation or opacity...so I get nothing on the image). > When I have it connected I can't set the minimum and maximum values. I > have many sequences of data (ie. things are changing with time), and I > don't want the minimum and maximum values to change when playing back > the sequences. > > I can't use AutoColor as I want to overlay multiple pieces of data, and > I want each piece of data to have a certain color. > > Is there a way to set the min/max values so that they don't change? Is > there a reason this won't work? > > Thanks, > > Brent Bailey > > > On Thu, 2004-12-16 at 11:50, Chris Pelkie wrote: > > Set the min and max values but disconnect the data input. You > > meanColormap not Colorbar, right? or not? Either way... > > > > > > On Wednesday, Dec 15, 2004, at 10:13 America/New_York, > > FabianBraennstroem wrote: > > > > Hi, > > > > I visualize some data sequences from several data-files. > > This works actually nice, but I have trouble to get the > > ColorBar not > > changing the colors for every different data-file. Right, now > > ColorBar adjusts the new data-file. I tried to avoid this by > > setting > > the 'min' and 'max' values, but this did not help. > > > > Can anybody give me any advice? > > > > > > Fabian Braennstroem > > Duesseldorf/Berlin > > > > > > > > _______________________________ > > Chris Pelkie > > Scientific Visualization Producer > > 622 Rhodes Hall, Cornell Theory Center > > Ithaca, NY 14853
