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[aeastet · Accepted solution]

Something like this would do what you want.

[ifyo]

thank you so much  aeastet, it worked, but one more thing,  i want the whole values to show on a xy graphy with the -5, -4, -3volts etc on y axis while their coressponding values on the  x-axis

[aeastet]

I am not sure what you want on the x and y axis so I did it the way I thougt you would want it.

[ifyo]

gud morning aesetet, thanks for your help. i notice u are very good with lab view and i want u to suggest some lab view tutorials that can help me improve my usage of lab view. thanks and i am waiting for your reply

[aeastet]

I would look up the examples for state machine architecture. Producer and consumer loops. These will be the biggest building block that will make your life easier.

Here are some good links to start with

http://zone.ni.com/devzone/learningcenter.nsf/webmain/51739EA30FAB12F8862570920065734B

http://zone.ni.com/devzone/conceptd.nsf/webmain/40464C588680E13186256CD300601790

http://zone.ni.com/devzone/labviewzone.nsf/OpenPage?openagent&lvsection=learningcenter

www.fafiles.com has some  introductory tutorial videos for labview for beginners, check it out

Hope this helps

http://school.mech.uwa.edu.au/~jamest/tutorial/ieindex.html

http://labviewwiki.org/LabVIEW_tutorial#External_Links

[ifyo]

thanks for the link

[ifyo]

gud evening all,

 can any one tell me how i can get my result from the labview simulation to display on the xy graph, with the values showing on the graph once the simulation stops. find attached the vi

[altenbach]

(First, you should delete the two size=1 "build array" nodes leading the the bundle function. They make no sense whatsoever.)

The number of iterations of your loop is known before the loop starts, thus you should use a FOR loop. No need to check the termination condition with each iteration.

Currently, the graph displays in real time as data arrives, one update for each new point. If you only want to show the graph once the loop has finished, place its terminal after the loop. You also don't need to build the array in a shift register, simply autoindex the points at the right loop boundary, then wire to the xy graph terminal.

I don't understand the song and dance with the tick counts and case structure. What's the point? It would seem more reasonable to simply place a proper wait inside the loop.

[ifyo]

THANKS Altenbach you solution worked

[ifyo]

gud evening all

I have an op amp circuit built on the NI ELVIS board and I input a square wave from function generator to the circuit. I have to determine the slew rate of the op amp. In the labs, one would run the square wave over a range of frequencies and stop when the square wave looks like a triangular wave. At that frequency, one would then measure the slope of the signal and that will give you the slew rate. How can I do that in LabVIEW? How can I check when my square wave starts looking like a triangular wave?