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

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dpb

Posts: 8,112
Registered: 6/7/07
Re: ploting in db
Posted: Mar 19, 2013 2:21 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

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

c=abs(complex(data(:,2),data(:,3)));

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

--




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