How do I plot 1hr intervals on the X-axis grid lines of a Waveform chart?

[hova2010]

Hello all

I am using a Waveform Chart in LV 8.5.1.

I have the "major" grid lines turned on. I want each grid line to represent a 1 hour interval of time...up to 24hrs

So as my data is plotted the intervals are fixed.

Can someone help me with this?

thanks

J

[Broken_Arrow]

So it's the chart settings you are having trouble with as opposed to the programming to write data once per hour to the chart?

At any rate, I hope the attached VI helps.

[hova2010]

My problem is really a programming question... using a Waveform Chart

My data is being plotted on the Y axis when my program runs.

What I want is when the data is being plotted, that the 1hr intervals dont get crossed until it matches that value in real time.

So if its now plotting data @ 4:04pm EST, .....the 5pm grid line should not get crossed until its real time 5pm EST and so on

Can you help with this ?

J

[Harold_Timmis]

than just change the display property for the waveform chart to absolute time...

[hova2010]

Yes, I already have the display format set to absolute time.

But I need the grid lines set only by the hour....using absolute time the choices are hh:mm  or hh:mm:ss

Each grid line should be 1hour value to the next.

How do I do this?  I have attached my code, but its not hour to hour.......

J

[Charlie_P]

Good Afternoon hova2010,

Try right-clicking the x-axis of the chart and going to the Display Format tab of the Properties window.  Once there, change the radio button option to Advanced editing mode.  In the format string, delete the "extra" portion of the entry so that it reads more like: %<%I %p %m/%d/%y>T

This will tell the chart to only display the hour portion of the time.