wave normalization

Does your data have a baseline? This should be subtracted prior to normalizing the curves.

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I have some simple macro's that I use when I have to try and get all data on the same scale.

macro NormalizeToH()
string list;
string name;
variable i;
variable peakArea
   
    list=WaveList("*",";","");
    i=0;
    do
        name=StringFromList(i,list);
        wavestats /q $name
        $name/=V_max;
        i+=1;
    while (1);
end

If you modified this to also subtract off V_min first and then divide by (V_Max-V_Min) then it might do what you want.

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Here is another approach which I use often:

Function NormTo1(inwave)
    Wave inwave
    Variable normval
    normval = wavemin(inwave)
    inwave -= normval
    normval = wavemax(inwave)
    inwave /= normval
End

Just select the waves you like to normalize inside the Data Browser and press the 'Exec. Cmd...' button. In the appearing window write Normto1(%s) and press ok.

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Hi Guys
thanks again for your useful suggestions, they have helped me out a lot.

cheers

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You'll want to be careful using Chozo's method if your data is prone to noise as the minimum value could be well below the baseline background signal. Of course this is highly dependent on the data you are working with.

In my case, I define a region of data that represents the background, take the mean of this data range and subtract it from the data, instead of just the min. Of course this is because my waves usually have a zero value near the start or end of the wave.

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