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Topic: ploting in db
Replies: 5   Last Post: Mar 19, 2013 6:49 PM

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Posts: 8,878
Registered: 6/7/07
Re: ploting in db
Posted: Mar 19, 2013 2:21 PM
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On 3/19/2013 12:05 PM, Steven_Lord wrote:
> "Yousef " <yayatoure@hotmail.com> wrote in message
> news:kia1ui$9hl$1@newscl01ah.mathworks.com...

>> Hi Guys,
>> Can anybody help me to change my y-axis to (db) logarithmic scale..
>> part of my code looks like:
>> c=sqrt(abs(data(:,2)).^2 + abs(data(:,3)).^2);


Steven answered the axis question, I'll simply note that the above can
be written more succinctly as


The abs() in your expression are purely superfluous since squaring a
value makes it positive.


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