Generate the output as a cell array using for-loops

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amateurintraining
amateurintraining 2017-10-10
评论： Guillaume 2017-10-10
I have a function:
function [ squaresCell ] = generateSquares( a,b )
%GENERATESQUARES
% a, b are two integers where a<b
% squaresCell: a two-dimensional cell array that contains the character
% arrays 'x=[x]' and 'x squared=[x^2]' in the first and second columns,
% respectively, for every value a=<x=<b.
for x=(a:b)
squaresCell={'x=[x]','x squared=[x^2]'};
end
But when running the following command, I get this:
>> generateSquares(3,9)
ans =
1×2 cell array
'x=[x]' 'x squared=[x^2]'
How do I get the output to show the values of the answer cell array, such that the answer responds:
>> generateSquares (3 ,9)
ans =
7x2 cell array
‘x = 3’ ‘x squared = 9 ’
‘x = 4’ ‘x squared = 16 ’
‘x = 5’ ‘x squared = 25 ’
‘x = 6’ ‘x squared = 36 ’
‘x = 7’ ‘x squared = 49 ’
‘x = 8’ ‘x squared = 64 ’
‘x = 9’ ‘x squared = 81 ’
  1 个评论
Guillaume
Guillaume 2017-10-10
Note:
for someindex = ...
something_that_does_not_depend_on_the_index = ...
end
just repeatedly overwrite the something_that_does_not_depend_on_the_index which, when the loop is finished, will just contain the value computed on the last iteration.

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Guillaume
Guillaume 2017-10-10
Where have you seen that matlab would replace the text [something] by the value of the something variable? If you invent your own syntax, it's no wonder that it doesn't work.
Probably the simplest:
function squaresCell = generateSquares( a,b)
squaresCell = [compose('x = %d', (a:b).'), compose('x squared = %d', ((a:b).^2).']);
end

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