Convert number to string problem
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I would like to ask if there is a way to output a number, which is stored as a variable, using simple commands, as shown in the following examples:
9 is converted to: 'The number is +9.'
6.54 is converted to: 'The number is +6.54.'
-7 is converted to: 'The number is -7.'
-9.2 is converted to: 'The number is -9.2.'
0 is converted to: 'The number is 0.'
I would like to display it in the command window and a message box (msgbox).
Please help. Thanks in advance.
采纳的回答
madhan ravi
2019-4-10
编辑：madhan ravi
2019-4-10
number = 10; % an example
if number>=0
sprintf('The number is : +%d',number)
else
sprintf('The number is : %d',number)
end
Assign a variable to sprintf() and then place it inside the command msgbox().
5 个评论
Angus Wong
2019-4-10
编辑：Angus Wong
2019-4-10
madhan ravi
2019-4-10
See https://in.mathworks.com/help/matlab/ref/sprintf.html#btf_bfy-1_sep_shared-formatSpec for more details adapt ehich suits you the best.
Angus Wong
2019-4-10
编辑：Angus Wong
2019-4-10
Guillaume
2019-4-10
Well, the first problem is that you use a different variable for each number instead of putting them all into a single array.
If the numbers were stored in a single array, your question is trivially solved in many ways. One way:
numbers = [9, 8, 0, -5, -6];
fprintf('The numbers are %s respectively.\n', strjoin(compose('%+d', numbers), ', '));
madhan ravi
2019-4-10
编辑：madhan ravi
2019-4-10
Thank you Guillaume, Stephen’s solution looks good but anyways let me give my suggestion too, use logical indexing group according to positive and negative numbers and use sprintf() all at once.
更多回答（1 个）
>> V = [9,8,0,-5,-6]; % your data should be in one array.
>> S = sprintf(', %+g',V(1:end-1));
>> S = sprintf('The numbers are%s and %+g respectively',S(2:end),V(end))
S = 'The numbers are +9, +8, +0, -5 and -6 respectively'
>> regexprep(S,'\+0([, ])','0$1') % if you don't like '+0'
ans = 'The numbers are +9, +8, 0, -5 and -6 respectively'
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