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How can I write a 2D array into a CSV file

14 次查看（过去 30 天）
Behrad Ze
Behrad Ze 2022-2-17
回答： Walter Roberson 2022-2-17
I have read an array from a csv file and done some calculations on that. After that, I want to save the array excactly like the CSV file I read.I would be thankful if anyone could help me with this .I have also attached a sample file. thank You so much
sample=readmatrix('71.csv');
Blank=readmatrix('Blank.csv');
x=sample(1,2:end);
y=sample(2:end,1);
RamanArea=5275.6715;
data=sample(2:end,2:end);
dataBlank=Blank(2:end,2:end);
[numRows,numCols] = size(data);
data=data-dataBlank;
for k = 1:numRows
for l = 1:numCols
data(k,l)=data (k,l)/RamanArea;
end
end
for i = 1:numRows
for j = 1:numCols
if (data(i,j)<=0)
data(i,j)=NaN;
end
end
end
xCSV=numRows+1;
yCSV=numCols+1;
xsvArray=csvArray(xCSV,yCSV);
csvArray(2:end,1)=x;
csvArray(1,2:end)=y;
csvwrite('file.csv',csvArray);
csvwrite('file.csv',x,1,0);
figure();
surf(x,y,data);
colorbar();
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Behrad Ze
Behrad Ze 2022-2-17
Exactly. I want to save the missed values as missing or NaN.the A1 is an empty space.I also have several missing values in the array which should be transfered to csv file. The X starts from B1.

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采纳的回答

Walter Roberson
Walter Roberson 2022-2-17
as_cell = [num2cell([nan, x]); num2cell(csvArray)];
as_cell(cellfun(@isnan, as_cell)) = {''};
writecell(as_cell, 'file.csv')

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