Using fprintf: string in array is NaN

Question

Lisa M 2020-2-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503837-using-fprintf-string-in-array-is-nan

编辑： Stephen23 2020-2-5

采纳的回答： Stephen23

在 MATLAB Online 中打开

Hi Everyone,

Please, see my code below. My data.name variable which is a string contains only NaN values when printed.

Any suggestions on how to solve this issue? Thanks in advance.

data.x= [0;1;0;1]
data.y= [1;1;1;1]
data.z= [0;0;0;0]
data.name={'Laura'; 'Caroline'; 'Lynne'; 'Charlie'}
input=[data.x data.y data.z convertCharsToStrings(data.name)]; 
fmt = repmat(',%.12g',1,size(input,2)); % numeric format for input
fmt = [fmt(2:end),'\n'];
[fid,msg] = fopen('test.csv','wt');
assert(fid>=3,msg)
fprintf(fid,'\n');
fprintf(fid,'\n');
fprintf(fid,fmt,input.');
fclose(fid);

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Answer 1

Stephen23 2020-2-5

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503837-using-fprintf-string-in-array-is-nan#answer_413973

编辑：Stephen23 2020-2-5

在 MATLAB Online 中打开

No need to convert data to string:

>> data.x = [0;1;0;1];
>> data.y = [1;1;1;1];
>> data.z = [0;0;0;0];
>> data.name = {'Laura'; 'Caroline'; 'Lynne'; 'Charlie'};
>> tmp = [num2cell([data.x,data.y,data.z]),data.name].';
>> fmt = [repmat('%.12g,',1,3),'%s\n'];
>> fprintf(fmt,tmp{:})
0,1,0,Laura
1,1,0,Caroline
0,1,0,Lynne
1,1,0,Charlie