graph scale doesn't use up the full plot area

[kaval]

The x-scale on my XY Graph doesn't go all the way to the edge of the plot area. I have attached a bmp showing what I mean. The 0 point of the X axis on the bottom plot is at the edge of the black plot area; however, it is a little bit in on the top one, and no data is plotted to the left of it. I am completely unable to figure out how to get it to move back, nor am I able to get it to go bad on demand. This has happened to me in the past, and has even gotten about half-way across the plot area, but I have never seen it happen. I have only noticed it after the fact.

How do I get my origin to be at the origin?

Thanks,
Matt K

[chilly_charly]

There are some bugs around with scale management in LabVIEW graphs. I spent a significant number of hours on such issues, and the only poor solution I found was to restore the axis to their original position using Right click>Advanced>Reset scale layout. Unfortunately, this is not accessible programatically.

CC

[ColoradoRuss]

Have you tried the property node X Scale>Range>Minimum set to zero (or whatever you want). Disable autoscale on that axis and set the min and max programmatically.

[kaval]

Resetting the scale layout gave me the attached picture, which is just as bad as what I had before. However, when I brought that control into the control editor, resetting the scale layout gave me something that looked much better. I only needed to do some minor resizing.

Thanks for the suggestions.
Matt

[Dennis_Knutson]

Have you tried turning of Loose Fit? Right click the graph and select X Scale. Loose Fit is the default. Deslect it and see if that fixes your problem.

[Caroline Bright]

Hello Matt,

I would also suggest right-clicking the graph and selecting Properties. A box will appear. Then select the tab for Scales. In the drop down box make sure that you select X axis. Then deselect autoscaling and put your minimum value as 0. This should set the origin to zero.
Try this out. If these suggestions do not work for you, I would like to try and recreate the problem here. If you could simplify your program down to the minimum that still illustrates the problem, I could try and find the problem.

Thanks,
Caroline
National Instruments

[kaval]

Caroline

I tried your suggestion, but it didn't work.
So I copy and pasted the bad graph and the good graph into a vi and am including it with this response.

Good luck.
Matt

[kaval]

I forgot to mention that I have been using LabVIEW 7.0. I have 7.1, but I haven't upgraded yet due to the number of other systems I will have to update the run-time-engine on.

Matt

[Dennis_Knutson]

You may have copied the graphs but you didn't copy the data. There's nothing in your example that shows the problem you're having. To save default data, go to Operate>Make Current Values Default. Save the VI and repost it.

[kaval]

The data isn't what's important. Wire whatever data you want to it, and the top graph will still have its x-origin a little bit to the right of the edge of plot area.

There have been several suggestions about checking the scale and autoscale. These don't affect where the left-most tick is located; they only affect what the value is. I believe that the problem is one level down in the control definition stating where the x-axis is relative to all the other decorations. Unfortunately, when the tick starts migrating to the right, it is not because I have edited the control in the control editor, but rather that LabVIEW itself has done something.

Matt