How to replace only one instance in a certain string

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Michael Boyle
Michael Boyle 2021-10-18
评论： Stephen23 2021-10-18
I am trying to use strrep() to replace the first 'e' with nothing '' and leave the second one alone in the following string:
x = 'e-8.5e-5';
y = strrep(x,'e','');
desired_final_ans = '-8.5e-5';
Is there a way to skip instances in strrep()?

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采纳的回答

the cyclist
the cyclist 2021-10-18
Ran in:
If you are certain that the first e is the first character of the string, then this will do it:
x = 'e-8.5e-5'
x = 'e-8.5e-5'
y = regexprep(x,'^e','')
y = '-8.5e-5'
The '^' indicates that the regular expression has to start the string.

更多回答（1 个）

Image Analyst
Image Analyst 2021-10-18
Here's one way:
eLocations = strfind(x, 'e')
x(eLocations(1)) = [] % Replace first e with null (in other words, delete it).

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