CODEWITHSUNDEEP
matlab
abhishek
abhishek

Reputation: 817

Convert an array of strings to a vector of numbers

I have this: 

d = {'2.5', '3.5'};
d = 
'2.5'    '3.5'

How do I convert it to a vector of numbers? 

d = 2.5   3.5

Upvotes: 3

Views: 12863

Answers (1)

gevang
gevang

Reputation: 5014

Given that you have a cell array of string values, you can use cellfun to apply str2num conversion on each entry. The output will be a vector/matrix of the converted values. 

d = {'2.3','3.5'}
dVec = cellfun(@str2num, d);

However, you are better using str2double than str2num. From the documentation:

Note: str2num uses the eval function to convert the input argument. Side effects can occur if the string contains calls to functions. Using str2double can avoid some of these side effects.

dVec = cellfun(@str2double, d);

Update: As @yuk points out, you can call str2double() directly on the cell array for the same output.

dVec = str2double(d);

Note that the same call with str2num() will give the "must be a string or string array" error.

Upvotes: 7

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