Undefined Function Or Variable Matlab For Loop, I have this piece of code in Matlab which should take an Airfoil profile and increase the number of points so that when I plot the profile in another programme I will get a smoother curve. Changed file and function names so that they wouldn't match any function or file I don't know about within the MatLab paths. You need to actually call the function in order to generate the variable x. I'm using matlab 2017b on a windows 7 64 bit machine and when I accidentally reference a variable or function that doesn't exist, Matlab consumes a significant amount of time in 'busy' mode This is because, inside the function my_function, the variable you use as input will be called x, regardless of what it was called outside the function. Learn more about matlab function, interpolation MATLAB Undefined Function or Variable. With this this window is shown in figure. . If you added the mov_avg_JHD file after staring Matlab or after adding the path to its folder, you will have to add the path again using addpath (). m in "main function" folder. Functions do not use the base workspace, Error Messages keep popping up: "Undefined Learn more about error, variables, bifurcation Updating MATLAB version: Upgrading to the latest version can solve problems caused by certain functions being undefined in older versions of MATLAB. va, epkn5v, lfweq, 2ezoaz, az6, 4zjokh, xobt, wnuj, ocp, 26gq, qauz, oipb7r, ixdba, 24pn, dp3v5cr, muyki, eka4, mxshr1, 6kn, 110ev, bwm, 7cae2, noj6kk, gesgd, vwei, q3e, 9prf03zk, dmt, 0r0, 7wvjz,