Assigning values to an int array from another file

[christianwos]

Hello everybody,

I have the code below that performs a time calibration on some data. The data is first acquired and stored in another file called dv_values.txt. dv_values.txt contains 1024 lines, each with one voltage value. I need to read each of these values and assign them to the array wf[i]. Can anybody help me please? Thank you.

#include <iostream>
#include <fstream>
#include <cmath>
#include <cstring>
#include <cstdlib> 
#include <ctime>

using namespace std;

int AnalyzeSlope(/*Averager *ave, */int iIter, int nIter, int channel, float wf[1024], int tCell, double cellDV[1024], double cellDT[1024]) 
// 1024 = number of cells
{
	int i;
	float dv, llim, ulim;
	double sum, dtCell;

	llim = -300;
	ulim =  300; // For now leave these values until nominal frequency is determined

	/* rising edges */

	// skip first cells after rigger cell
	for (i = tCell+5 ; i<tCell+1024-5 ; i++) {
		// test slope between previous and next cell to allow for negative cell width
		if (wf[(i+1024-1) % 1024] < wf[(i+2) % 1024] && wf[i % 1024] > llim && wf[(i+1) % 1024] < ulim) {

			// calculate delta_v
			dv = wf[(i+1) % 1024] - wf[i % 1024];

			// average delta_v; instert here averager value
		}
	}

	/* falling edges */

	// skip first cells after rigger cell
	for (i = tCell+5 ; i<tCell+1024-5 ; i++) {
		// test slope between previous and next cell to allow for negative cell width
		if (wf[(i+1024-1) % 1024] > wf[(i+2) % 1024] && wf[i % 1024] < ulim && wf[(i+1) % 1024] > llim) {

			// calculate delta_v
			dv = wf[(i+1) % 1024] - wf[i % 1024];

			// average delta_v; instert here averager value
		}
	}

	// calculate calibration every 100 events
	if ((iIter + 1) % 100 == 0) {
		// average over all 1024 dU
		sum = 0;
		for (i=0 ; i<1024 ; i++) {
			// averager value for: cellDV[i] = ave->Median(0, channel, i);			
			sum += cellDV[i];
		}
		
		sum /= 1024; // sum = sum/1024
		dtCell = (float)1/fNominalFrequency; // fNominalFrequency needs to be determined separately

		// dT =dV/average * dt_cell
		for (i=0 ; i<1024 ; i++)
			cellDT[i] = cellDV[i] / sum * dtCell;
	}
	return 1;
}

[lastchance]

ifstream in( "dv_values.txt" );
for ( int r = 0; r <1024; r++ ) in >> wf[r];
in.close();

[christianwos]

Great! Thanks.