Absolute time display on xy graph - not enough info displayed

[edk]

I have a small pair of arrays and want to display the absolute time at each point, but try as I might, I cannot get the xy graph to display more than 3 entries on the x (time) axis - one at each end and one in the middle. I have used the xy graph many times and thought I knew it well, but I am stumped.

This is almost certainly a question of how to set up the formatting on the graph, but -

Background - two arrays of 12 DBL each (time, amplitude). When I create the arrays the x-axis is in relative hours (DBL, not timestamps). This bundle displays on the graph with the x-axis formatted for DBL. The numbers are the amount of time, in hours, for each step in the sequence.

To display it in absolute time, I convert hours to seconds (hours*3600 seconds/hour) , then add the current date/time timestamp - viola, an array of absolute timestamps. Rebundle and display on an xy graph, and the time display is incomplete.

Here are jpegs and the test vi. Thanks in advance.

Ed K.

xyTimeDisplay.vi

[Ton Plomp]

How about using the 'old' XY graph, and changing the offset of the data-points on the X-chart?

Ton

[Darin]

Have you looked at the Display Format for the X-axis (Right-Click->Properties)? You can set the format of the time and date, I usually choose System Time and System Date formats. Your picture looks like it is set to 'Date Unused'. Is this what you mean by 'incomplete'?

[edk]

Sorry - what I mean by "incomplete" is that I want to show a time for each (or a few) points in the sequence, e.g. I want the user to know that the temperature will ramp to 0C starting at 18:05, and will soak there until 19:05. I can't get more than 3 times displayed on the axis no matter how I massage the formatting or scale style.

Ton - what is an "old" xy graph? I pulled this out of the classic controls palette on LV 2009 and saved it for 8.6. And I see the "offset" in the properties, but don't understand why it's there - this is a xy graph, not a chart. It plots x vs. y, no? The x-scale is built in to the data?

[Darin]

By coercing the Timestamp array to a DBL array and writing it to the X Axis MarkerVals[] property I could certainly get more than three points to show up on the axis:

[edk]

Hah! Perfect! I forgot to browse the properties and concentrated on the formatting. Thanks, guys.