| T O P I C R E V I E W |
| fastcloud |
Posted - 06/20/2013 : 08:50:54 AM
Origin Ver.9 (Student) 64bit
Operating System:Windows7 64bit
Hi, I'm new to this forum!
I'd like to make 1D sine wave signal file with given parameters as;
* shuffle 5 known frequencies every 1 second.
* amplitude fixed to given value (min.~max.)
* sampling frequency at 1500 Hz.
* total length of the data is 5 seconds.
Could any guru help me?
Sanghyun |
| 2 L A T E S T R E P L I E S (Newest First) |
| fastcloud |
Posted - 06/20/2013 : 8:17:03 PM
Dear Greg;
Your scrip worked great!
I do appreciate your help.
Best regards,
Sanghyun |
| greg |
Posted - 06/20/2013 : 4:57:41 PM
Not sure what shuffle is supposed to do.
How about this...
New Project
Copy and Paste the following to the Command Window and press Enter
// BEGIN SCRIPT
// The setup
double dSPS = 1500; // Samples per second
double dSeconds = 5; // Seconds
string strFreq$ = 30 60 120 240 480; // List of frequencies
min = 38; // Minimum
max = 76; // Maximum
// The script
col(1) = data(0,dSeconds,1/dSPS);
get col(1) -e last;
double dFreq;
int tVal;
loop(ii,1,last)
{
tVal = col(1)[ii];
if(tVal == int(tVal) && tVal < 5)
{
// "shuffle"
string strThisFreq$ = strFreq.GetToken(tval+1)$;
dFreq = %(strThisFreq$);
}
col(2)[ii] = sin(2 * pi * dFreq * col(1)[ii]);
}
frange = max - min;
col(2) *= ( frange / 2);
col(2) += ( frange / 2 + min);
// The Plot
plotxy iy:=(1,2) plot:=200;
// The proof
fft1;
win -a Graph2;
// END SCRIPT |
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