Converting string to num with a specific format in Matlab

Question

>> str = '0009.51998'
>> str2num(str)

or

>> sscanf(str,'%f')

ans = 9.5200

I want to get this instead:

ans = 9.51998

if you already have a string, why are you suing num2str? (I realize this doesn't change your question/answer it) — St-Ste-Ste-Stephen
– St-Ste-Ste-Stephen, Commented Jan 12, 2012 at 17:56

Andrey Rubshtein · Accepted Answer · 2012-01-12 22:59:27Z

3

You are getting that. It's just being rounded off to four decimal places when it's displayed. Do format long to see more precision.

>> str = '0009.51998';
>> x = sscanf(str, '%f')
x =
    9.5200
>> format long
>> x
x =
   9.519980000000000
>>

You can also use str2double as an alternative to sscanf. It's safer and more flexible than str2num. That is because str2num uses the eval command. For example, try the following:

  str2num(' figure();imshow(''peppers.png'')')

You might be surprised at the results.

edited Jan 12, 2012 at 22:59

Andrey Rubshtein

21k11 gold badges73 silver badges106 bronze badges

answered Jan 12, 2012 at 17:56

Andrew Janke

24k5 gold badges60 silver badges89 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Converting string to num with a specific format in Matlab

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related