MATLAB Matlab: Problem with structures

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The discussion centers on a MATLAB coding issue where a user encounters an error when using a variable 'id' that is a two-digit number. The error message indicates insufficient outputs for a comma-separated list, suggesting a problem with how 'id' is being interpreted. A suggestion is made to convert 'id' to a number using str2double to ensure it is treated correctly, as it may be interpreted as a string when it has two digits. Additionally, there is a recommendation to consider using a class instead of a structure for better data management. Overall, the focus is on resolving the error related to variable interpretation in MATLAB.
craigpmorgan
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Hi All,

I've written some code in Matlab that calculates a number of parameters and saves the data to a structure. A portion of the code is shown below:

uniqueName = genvarname(date);
plant(id).(uniqueName) = {date avgHeight avgVol};
.
The various parameters such as avgHeight etc. are defined earlier in the program. The confusing thing is that the code works fine when 'id' is a single digit number. However, when 'id' >= 10, the program returns the following error:
.
? Insufficient outputs from right hand side to satisfy comma separated
list expansion on left hand side. Missing [] are the most likely cause.
.
I don't understand the error message and don't know what to do next.
Any help I receive will be greatly appreciated.
Thanks very much for your time,
Craig
 
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You might consider building a class instead of using a struct.

As for the error, there's not much to go on without having more code.
 
As far as I know, a structure is a type of class in MATLAB:http://www.mathworks.com/help/techdoc/matlab_oop/brh2rgw.html#brgljyu

craigpmorgan, try:

plant(str2double(id)).(uniqueName) = {date avgHeight avgVol};

so that you convert id to a number in case it's a string. It seems to me like it's interpreting 10 (for instance) as a 1 and 0 in a string array, rather than a single 10 in a number array.
 
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