Intensity graph and its "interpolate color" option

[ghighuphu]

Dear Devs,

using LV2013.02f, my intensity graph never redraws correctly (it remains black), after I uncheck and check the "interpolate color" option in the right-click menu for the z-axis. Is this reproducible for anybody, please?

Note: There are more situations when the intensity graph remains black after changing some options, but I could not reproduce them systematically. Any ideas what to use instead of it to display 2D arrays of values?

Cheers,

[GerdW]

Hi ghi,

an example would be nice to actually see the whole picture...

- Did you enable autoscaling of z axis?

- Which data (values) are you displaying?

You could also use a 3D graph to display 2D arrays...

Well, ghi decided to open a duplicate thread on the same topic...

[ghighuphu]

Dear GerdW,

thank you for the suggestion: I am displaying a 2D array of DBL values. The excerpt from my Vi is attached with saved values. Steps to reproduce:

- run the VI: the graph is filled with color (vertical stripes)

- right-click on the z-axis color bar and deselect "interpolate color"

- run the VI: the graph will turn black

- change the "interpolate color" option

- run the VI: the colors will never come back (except for the remaining black)

Cheers,

P.S. Posting the message exhibited the following message: "The contents of the attachment doesn't match its file type.". Therefore I wrapped my VI into an 7-Zip archive.

[GerdW]

Hi ghi,

the forum has severe Upload-problems...

Can't open LV2013 VIs right now, so you have to wait for someone else to step in...

[ghighuphu]

Dear users,

dear GerdW

Related issue:

Intensity graph displays a black z-axis color bar

The issue(s) are connected to the positions of the markers on the color bar. I converted the VI to a 2010version (again, wrapped in a 7-Zip archive), I hope that helps for now.

Now, when I multiply my 2D array with a suitable high- and at the same time low-enough value (multiplier=1E+34) -- 1E+33 is too low, 1E+35 is already too high; then the markers of the color bar are visible suddenly. The "interpolate color" and the blackness of the graph can be now manipulated and adjusted.

So now, I have to remember that the default markers' positions are (0,50,100) and there is no way to change them before I extend the values of my array over this region suitably. Seriously, I went through all the right-click on the z-axis menu items and executed them one-by-one. None of those brought the z-axis color bar or the colors back into the graph again.

Q: How should a novice know about it? Isn't there a "reset all markers, distribute them equally and show all values in the default spectrum color" button somewhere, and did I missed it?!

Cheers,

[ghighuphu]

Dear users,

so, if anybody is interested and also to suit my bad memory, I am posting a screenshot of a solution to set the markers and to display all the available data in the array automatically.

 

Cheers,

[GerdW]

Hi ghi,

hint: you should use colorboxes instead of U32 constants. Or atleast set them to display hex values...

[blessedk]

I have a  similar but somewhat unique case. My intensity graph has alwayys worked  and this particular one has been working on this particular vi. I just don’t know what has changed., but all of a sudden any intensity graph on that vi remains black. I have tried your ideas here no luck. If I clone the same graph onto another vi it works OK but as long as it sits on this partiicular vii, it displays black. The color ramp displays OK  but the graph remains black. No auto scaling applied. Cannot share the VI

[RENN]

Hi all,

i had the same problem when selecting 'interpolate color' option.

In the LV Development system when vi is running, this selection is working but not in the executable!

Please find the attached vi, create an exe to see the fix working.