Every function has its own function workspace. The problem is that functions can't access this workspace:įunctions do not use the base workspace. What this tells you is that you have a variable called y in your Matlab Workspace (also check this link). If you get the error above "Undefined function 'y', but which tells you y exists, your error message contains a few more lines: my_function(x) But I get "y is a variable" when I type which y? You will also get an orange line underneath unused variables.Ĥ. Inside the Matlab editor you will get the following line at the bottom if you mark a variable: "3 usages of "x" found" if you have defined and used the function.
Look for typos, places where you have accidentally cleared the variable etc. It's also possible that you have created it, but have accidentally cleared it. Chances are you created the variable myvariable, my_Variable, my_Variable or something similar in the line above. But the variable "my_variable" exists! I created it in the line above! An alternative to table can for instance be to use cells or structs.ģ.
#Ttest2 function matlab python update
If it's not yet implemented then you either need to update Matlab or find another way to do it. Solution: Check if the function is defined in your version of Matlab. So, if you are using R2012b then you can't use for instance table.
If you check the documentation you'll see the following at the bottom of the page: The most likely cause for this error is that you are using an older version of Matlab. But the function is documented here, and is part of core Matlab!?Įven though a function is part of the standard Matlab installation, and is well documented, you may still get this error. Explain what you have tried, and show that you have done some effort!Ģ. Chances are you'll find what you are looking for if you are a skilled googler. Solution: Find another function that isn't part of a toolbox you don't have. Or maybe it's part of the Neural Network Toolbox: /help/nnet/ref/train.html If however, you see an address such as the one below, then the function you are trying to use is part of the Symbolic Toolbox: /help/symbolic/int.html If you see this, then you are using a function that is part of the core Matlab. Standard Matlab functions have addresses such as: /help/matlab/ref/max.html If you get the "Undefined function" error, but find the function in the documentation, have a look in the menu to the left, or simply check the address. Since Toolboxes are additional packages that must be purchased separately (and can be quite expensive), chances are you don't have that package.
Yes, int exists, but only if you have the Symbolic Toolbox. But the function "int" exists! It is even documented here!? Let's compare it to max: which maxīut, you might get the following, even if you get the "Undefined function 'x'. It's quite obvious, that Matlab can't find any functions or variables named int. This will tell you whether or not the function or variable you're trying to use is defined. You are trying to access an element in a variable that doesn't exist (yet)įirst, you might want to try which.You are trying to use a function that doesn't exist (yet).There are two main cases where this error occurs: (I chose 'int' at random, it could just as well be 'train', 'table', 'my_function' or anything else). The error message is pretty self-explanatory but may still cause confusion. "Undefined function 'int' for input arguments of type 'double'." Take comfort in this: 90% of us have googled the same phrase. If you stumble upon this error message and don't know what it means.
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