how to uncombine variables from one variable?

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cemsi888
cemsi888 2015-1-23
评论： Image Analyst 2015-1-23
Hi again i have one variable which contains 181 variables. do you know how to uncombine these variables from one variable?
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Geoff Hayes
Geoff Hayes 2015-1-23
Pleas clarify - do you have a struct variable with 181 fields, or a cell array of variables, or something else? Provide a small example of what you have and what you would like to see after the variable has been broken apart.
cemsi888
cemsi888 2015-1-23
编辑：Image Analyst 2015-1-23
I uploaded a picture. I have 181 fields in one structure variable.

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Image Analyst
Image Analyst 2015-1-23
I have no idea why you want to do this - it seems like it would make the program less convenient after this. Of course you could always use the brute force way:
U_in_1 = s.U_in_1;
dp_SL_amp = s.dp_SL_am;
% and so on for the remaining 179 items...
You could tuck all that inside a function rather than clutter up your main program.
You could also use a loop if you call fieldnames() and eval().
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cemsi888
cemsi888 2015-1-23
thanx a lot!! yes i can call fieldnames but i could not make out Loop. could you give me some advices?
Image Analyst
Image Analyst 2015-1-23
Try this:
% Reference: http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F
% Create sample data.
myStruct.field1 = 10;
myStruct.field2 = [20, 30, 40];
myStruct.field3 = 'abc';
myStruct.field4 = {'a cell array', 'cell #2'};
% Get the field names of the structure.
fn = fieldnames(myStruct)
% Go through all field names creating a variable with
% the name of that field, and with a value the same as that field.
for k = 1 : length(fn)
commandString = sprintf('%s = myStruct.%s', fn{k}, fn{k});
eval(commandString);
end

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