Creating variables from iterative variables and output strings?

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0 个投票

This is a question on how to create variables when you don't know exactly how many you might need or need to change frequently. For example, if you have an unknown or undecided amount of features and you want to create a variable to store information for each one. Below shows what I want to put in, but I want to automate it so that for example I only have to type in a a few lines of code to generate a hundred variable names and iteratively repeat the same commands (eg. - mean)

input: 6 categories (t1 , ... , t6) ; 4 features ( max , min , µ , std)

['var_name_goes_here'] = mean(avg_fv4_sub(m*(0:s-1)+1,1));
['var_name_goes_here'] = mean(avg_fv4_sub(m*(0:s-1)+2,2));
...

output:

maxa4_mu_t1 = 159
maxd4_mu_t1 = 12
...
maxd1_mu_t6 = 100

3 个评论
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Rory Donovan 2016-5-8

编辑：Rory Donovan 2016-5-8

在 MATLAB Online 中打开

So something along the lines of,

X1 = struct('f');
X2 = struct('g')
...
for i = 1:n
  a = strcat(...);
  X1(i).f = eval(a);
end

For each feature. Thanks

Stephen23 2016-5-9

编辑：Stephen23 2016-5-9

Nope.

You didn't read my answer and you didn't get the point at all: avoiding the awful eval. Read my answer (and all links) to know why you need to avoid doing this (or read any of the hundreds of other threads on this topic).

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