Convert String Array to Numeric matrix and string array

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Jochen Petersen
Jochen Petersen 2019-6-30
评论： dpb 2019-6-30
Hi! I have a 3 by 15 string matrix. I wish to extract the first and third row as numbers to be assigned to a numerical matrix, while extracting the second row as a row of strings, which are to be assigned to another matrix.
Here is the info:
data_events=
"1" "60" "" "" "" "" "" "" "" "" "" ""
"-" "" "" "" "" "" "" "" "" "" "" ""
"60" "50" "2" "25" "0" "0.2" "0.2" "10" "1000000000" "100000" "100000" "1000000000"
Columns 13 through 15
"" "" ""
"" "" ""
"100000" "100000" "1080"
The idea is to create a matrix Event_Vals, which consists of the stuff in the first and third rows, while another matrix, Event_Comments is to contain the contents of the second row.

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回答（2 个）

per isakson
per isakson 2019-6-30
Try this
%%
data_events = [
"1" "60" "" "" "" "" "" "" "" "" "" ""
"-" "" "" "" "" "" "" "" "" "" "" ""
"60" "50" "2" "25" "0" "0.2" "0.2" "10" "1000000000" "100000" "100000" "1000000000"
];
%%
Event_Vals = str2double( data_events([1,3],:) );
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per isakson
per isakson 2019-6-30
+1
I had missed "Unlike the char function, string does not treat numbers as ASCII or Unicode® code points."
dpb
dpb 2019-6-30
Me neither. Having MATLAB act similar to BASIC is not something we're used to...I've yet to play that much with the string class so still discovering such things, too.

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dpb
dpb 2019-6-30
EventVals=str2double(data_events(1:2:end,:));
EventCmnt=data_events(2,:);

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