Accuracy problems with programmable cursors in XY graph

[nki]

Hi,

I want to generate multiple cursors in my YX graph but the accuracy of cursors are very bad. Can someone help me.

[johnsold]

The cursors are as accurate as the data you feed to the graph.  The formatting of the data in the cursor legend is the same as the formatting on the graph axes and can be changed in the Properties dialog box or programmatically.  If you want to display the cursor data in a different format from the axis format, you can use the Cursor.Index property and Index Array to get the data point from the original data and then display it in a separate indicator.

Lynn

[nki]

The problem is when I run the VI the X value of the cursor not correspond exactly to the value I want. I have to re-run several the VI to obtain the right value

[nki]

The problem is when I run the VI the X value of the cursor not correspond exactly to the value I want. I have to re-run several the VI to obtain the right value

[johnsold]

How are you setting the cursor?

Lynn

[nki]

I create 4 cursors as single-plot in cursor accuracy VI (right click and create cursor). And with the frequency cursor sub VI it supposed to configure them automatically. But maybe I'm wrong...

[johnsold · Accepted solution]

I have never used that property.  Since the only thing that can change is the values in the 4 controls, write the values of those controls to the Cursor.Position X property directly rather than through the list. I think you need to set the Active Cursor property for each one first.

Lynn

[nki]

Thank you very much It works -_-