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Upscale integer array

Posted on 2013-05-23
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Last Modified: 2016-09-30
Hello,
  I have some acquisition data stared in the following  arrays:

const
cChannels = 6;
cMaxSampleDuration = 420;

var
    MyIntegerArray: array[0..cChannels -1, 0..cMaxSampleDuration -1] of Integer;

Sample Data
As you can see from the screenshot, the first channel has range -4.000 up to 4.000 and the other have smaller range. how can upscale the other channels to be almost in equal range of the first channel ?

Thank you
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Question by:chmichael
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Accepted Solution

by:
Sinisa Vuk earned 500 total points
ID: 39192655
Is this similar question as you asked before? Do you have problem with my code?
http://www.experts-exchange.com/Programming/Languages/Pascal/Delphi/Q_28126546.html

For this request - little modification:
var
  MyIntegerArray: array[0..cChannels -1, 0..cMaxSampleDuration -1] of Integer;
  MaxVal, Channel, Samples, MaxAmp: Integer;
...
  MaxAmp := 4000;

  for Channel := 0 to 6 -1 do
  begin
    //pre scale to get max
    MaxVal := 0;
    for Samples := 0 to cMaxSampleDuration -1 do
      if Abs(MyIntegerArray[Channel, Samples])>MaxVal then MaxVal:=Abs(MyIntegerArray[Channel, Samples]);

    //scaling
    for Samples := 0 to cMaxSampleDuration -1 do
      MyIntegerArray[Channel, Samples] := MulDiv(MyIntegerArray[Channel, Samples], MaxAmp, MaxVal);
  end;

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