input arguments of type 'struct' !?

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Jonathan Roy
Jonathan Roy 2012-1-26
回答： Rakshith Vishwanatha 2020-12-10
I got this error when I call a function (Undefined function or method 'ndsort' for input arguments of type 'struct'.)
I realy don't know the origin of this error. Im trying to run this code (NGPM -- A NSGA-II Program in Matlab v1.4 ) and it is the function ndsort who did this error...
if someone have a clue it will be very appreciate
thank !

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采纳的回答

Aurelien Queffurust
Just type :
which -all ndsort
I guess this function is not on your path. You will get the same error by typing:
>>s = struct('type', {'big','little'}, 'color', {'red'}, ...
'x', {3 4})
>> madonna(s)
??? Undefined function or method 'madonna' for input arguments of type 'struct'.

更多回答（2 个）

Rakshith Vishwanatha
Posting this miscellaneous case of " input arguments of type 'struct' " error in case others find this useful:
In my case, I was runnnig my own local matlab scripts and the "lqrpilot" example code in matlab. The constant swapping between two paths, loading and clearing of workspace variables and matlab paths while working with these two code bases located in two different places seemed to have messed up the function path requirements of matlab. Due to this, I started getting " input arguments of type 'struct' " errors on my project/code base as well though it was not of primary use.
Closing and restarting MATLAB helped it reset all variables to default values and both code bases started to work again.
SAQR THABET
SAQR THABET 2019-5-7
If this function is not on your m.file path then while you are editing your m.file simply open the folder of the desired funtion via the current folder tap, right click on the faded folder icon and select <add to path> whick will include all folders and subfolders. the folder icon will become bright, which means the folder path was added successfully.
You can test if the function is now defined or not using:
which -all function

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