Created
October 3, 2014 16:48
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read csv with text and numeric data
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function outputStuff = mfcsvread(fileName) | |
%mfcsvread reads a CSV file containing both text & numeric data. MATLAB's | |
%csvread function will work with all numeric, or all text data, but not | |
%both. It's common to have a file with a single line of comma separated | |
%text headers followed by many rows of numeric data. xlsread is limited in | |
%the number of rows & colums (actually, Excel is the limitation) it can | |
%read. | |
% | |
% The CSV file should look like: | |
% comma, separated, text, ... | |
% 1,2,3,4,5,... | |
% 6,7,8,9,10,... | |
% etc... | |
% | |
% The output is a structure with the column headers as fields in a | |
% structure each with a vector of data. | |
% Open the file | |
if ~exist(fileName, 'file') | |
error('File not found.'); | |
end | |
fid=fopen(fileName); | |
% Start reading the data | |
tline = fgetl(fid); % Read in the first line only (text headers) | |
tline = tline(tline~='"'); % kill " | |
tline = tline(tline~=' '); %Get rid of any spaces | |
commaLocs=findstr(',',tline); % find the commas | |
fieldNames=cell(1,(length(commaLocs)+1)); | |
start=1; | |
for colIdx=1:length(commaLocs) | |
fieldNames{colIdx}=tline(start:commaLocs(colIdx)-1); | |
start=commaLocs(colIdx)+1; | |
end | |
fieldNames{colIdx+1}=tline(start:end); | |
%Read in the rest of the data (should be numeric) | |
fieldData=csvread(fileName,1,0); | |
%Convert the data into a single structure. | |
[cellW cellH]=size(fieldNames); | |
numFields=max([cellW cellH]); | |
%Needs to be a 1xN or Nx1 cell-array. | |
if ~iscell(fieldNames) | |
disp('Needs to be a cell-array'); | |
return; | |
elseif cellW ~=numFields && cellH ~=numFields | |
disp('Needs to be 1xN or Nx1'); | |
return; | |
end | |
dataSize=size(fieldData); | |
arrayDim=find(dataSize==numFields); | |
if isempty(arrayDim) | |
disp('Dimensions are wrong'); | |
end | |
outputStuff=[]; | |
% if arrayDim==2 | |
% for idx=1:numFields | |
% outputStuff.(fieldNames{idx})=fieldData(:,idx); | |
% end | |
% else | |
% for idx=1:numFields | |
% outputStuff.(fieldNames{idx})=fieldData(idx,:); | |
% end | |
% end | |
outputStuff = struct(... | |
'header', {fieldNames},... | |
'data', fieldData); | |
fclose(fid); |
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