LabVIEW
Problem to plot a function
All tools are right there (Make sure to adjust dx of the x axis or use an xy graph if desired)!
Or just use an expression node 😉
Message Edited by altenbach on 02-11-2007 11:18 AM
Why is it in a FOR loop? Please attach your program so we can find a better solution for your specific environment. 🙂
The only thing that needs to be in a loop (unless you use the ramp function, where you don't even need any loop at all ;)) is the generation of the X values. Optionally you can also place the calculation in a loop as seen in the second example below.
The graph terminal only needs to be in the loop if the loop is very slow and you want to see the curve grow. In this case you would need to built the array in a shift register. In all other cases it is a waste of resources to update the graph 100 times in a row.
Message Edited by altenbach on 02-11-2007 01:37 PM
(1) Your VI calculates sin(e^(-x) * 20x), which is quite different to e^(-x) * sin(20x).
(You need to take the sine of 20x and multiply the result with exp(-x). The multiply goes after the sine function.)
(2) Your X range is incorrect, it goes from 0..100 instead of 0..5. You need to multiply [i] by 0.05 before feeding it to the rest of the formula.
