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fprintf and arrays of varying length

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Keith Holmlund
Keith Holmlund 2018-6-19
评论： Stephen23 2018-6-19
I have a function where one of the inputs is an array, i.e A = [1 1 1 1] or A = [1 1 1 1 1 1 1]. I would like to use fprintf and/or sprintf to write the array to a text file. I know I can specify formatSpec to a specific length, like '%d %d %d %d' but if the array can vary in length, is there a way to make sure the formatSpec has the same number of %d as the amount of numbers in the array
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Stephen23
Stephen23 2018-6-19
"is there a way to make sure the formatSpec has the same number of %d as the amount of numbers in the array"
fprintf(' %d',A)

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采纳的回答

Ameer Hamza
Ameer Hamza 2018-6-19
编辑：Ameer Hamza 2018-6-19
A = [1 1 1 1 1];
repmat('%d ', 1, length(A))
ans =
'%d %d %d %d %d '
sprintf(repmat('%d ', 1, length(A)), A)
ans =
'1 1 1 1 1 '

更多回答（1 个）

Star Strider
Star Strider 2018-6-19
The fprintf (and sprintf) functions will do that by default:
A = [1 1 1 1 1];
fprintf('%2d', A)
fprintf('\n')
1 1 1 1 1

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