LabVIEW
Plotting 2 arrays
Veeru wrote: I am not an advanced programmer, just started learning LabVIEW so just worked with some examples, mistakes are very common in everyones life.
You did not make mistakes with the FOR loop here, its' just that there are better ways to do certain tasks and it is best to learn better ways early in the LabVIEW experience. That's why I am pointing out these things.:)
First priority is to get the correct results no matter what, and after that you can think of ways to simplify the code to improve code readability and code efficiency. LabVIEW allows you to write very functional code with very few steps. Autoindexing and polymorphism is a cornerstone of efficient coding, so that's something you should learn early. Please study my image.
With a bit of experience, everybody can be Tiger Woods of LabVIEW and do the same thing in fewer strokes. Your frame #2 was just one of those triple bogeys that every beginner makes while learning. 😄
A big source of potential coding errors is your stacked sequence structure, because it is nearly impossible to verify where the data flows between the frames. All these sequence locals break up the dataflow and you need to constantly flip between frames to see what's connected to what and to verify that no wires are crossed. 80%+ of all code is hidden at any point in time. It is like playing golf in dense fog! There is no reason to sequence your code. Dataflow ensures that nodes only execute once data has arrived at all inputs, so in this case the sin, cos and atan will execute at the correct time and anything after it will wait until they produce output.
We have seen much worse code. For an illustrative experience, browse some of the code posted in the Rube Goldberg Thread.
Maybe you can show us how far you got?
If you cannot solve the problem, it is time to go over the tutorial once more. I am pretty sure everything you need to know is covered in the tutorial. 😄
What specific road blocks are giving you problems?
Mbdeck wrote:
Next, I connected the array subset function to separate the three rows. (is this correct function here or the build array function)
To get rows, you use index array. specify the one index and leave the other index unwired and you'll get and entire row (or column, depending on which index you wire. If you wire both indices, you'll get a single element.). You can resize the index array terminal to get several rows or columns.
Mbdeck wrote:
After adding the array subset function, I then connected it to the bundle function. This was where the main dificulty was. I couldn't connect the data that emerged to the waveform graph. It keep showing erroneous wiring between the bundle function and waveform graph.
Waveform graphs accept 1D arrays, so just wire each row to its graph terminal. No bundle needed (don't use an xy graph!).
- create your 2D array.
- Use a single "index array" resized to three outputs.
- Get the three rows as described and wire each to a graph terminal.
Voila!
NO!
Mbdeck wrote:
...and plot each row on its own graph. The front panel should contain three graphs".
If you want all plots on the same graph, you would just wire the 2D array (transpose if needed).
