could anyone tell me what's the error with this code?
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// nonrec.cpp -- non-recursive filter design // NRLowPass() build NR low-pass filter // NRHighPass() build NR high-pass filter // NRBandPass() build NR band-pass filter #include "tools.h" #include "ltisys.h" // sinc() or sin(x)/x function double sinc(double x) { if (x==0) return cos(x); else return sin(x)/x; } // Create non-recursive low-pass filter by Fourier Transform method LTISystem NRLowPass( double freq, // corner freq (fraction of sampling rate) int ncoeff // # coefficients ) // returns LTI system to specification { int i; // convert frequency double omega = 2 * PI * freq; // build half-sized window from sinc function int nhalf = ncoeff/2; Waveform hwv(nhalf,1.0); for (i=1;i<=nhalf;i++) hwv[i] = omega * sinc(i*omega)/PI; // window with (half-)hamming window for (i=1;i<=nhalf;i++) hwv[i] *= 0.54 + 0.46 * cos(i*PI/nhalf); // create new LTI System LTISystem lpfilt(2*nhalf,0); // copy impulse response into system // (indexed -nhalf .. 0 .. nhalf) lpfilt.a[nhalf] = omega/PI; for (i=1;i<=nhalf;i++) { lpfilt.a[nhalf-i] = hwv[i]; lpfilt.a[nhalf+i] = hwv[i]; } return lpfilt; } // create high-pass non-recursive filter from low-pass prototype LTISystem NRHighPass( double freq, // corner freq (fraction of sampling rate) int ncoeff // # coefficients ) // returns LTI system { // get low-pass version LTISystem hpfilt = NRLowPass(0.5-freq,ncoeff); // now modulate with cos(n*PI) = +1,-1,+1,-1,... int nhalf = hpfilt.a.count()/2; for (int i=1;i<=nhalf;i+=2) { hpfilt.a[nhalf-i] = -hpfilt.a[nhalf-i]; hpfilt.a[nhalf+i] = -hpfilt.a[nhalf+i]; } return hpfilt; } // create band-pass non-recursive filter from low-pass prototype LTISystem NRBandPass( double lofreq, // low corner freq (fraction of sampling rate) double hifreq, // high corner freq (fraction of sampling rate) } int ncoeff // # coefficients ) // returns LTI system { // get low-pass prototype LTISystem bpfilt = NRLowPass((hifreq-lofreq)/2,ncoeff); // now modulate with cos(n*centrefreq) int nhalf = bpfilt.a.count()/2; double cf = 2*PI*(lofreq+hifreq)/2; bpfilt.a[nhalf] = 2 * bpfilt.a[nhalf]; for (int i=1;i<=nhalf;i++) { bpfilt.a[nhalf-i] = 2 * bpfilt.a[nhalf-i] * cos(i*cf); bpfilt.a[nhalf+i] = 2 * bpfilt.a[nhalf+i] * cos(i*cf); } return bpfilt; }
ashwiny wrote:
#include "tools.h"
If you right-click this statement, can you open the
tools.hfile?"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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ashwiny wrote:
#include "tools.h"
If you right-click this statement, can you open the
tools.hfile?"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Then that's your clue that the IDE has no idea how to find that file. What version of VS are you using?
"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Then that's your clue that the IDE has no idea how to find that file. What version of VS are you using?
"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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On the Options dialog, click the Directories tab. Is the directory that contains the
tools.hfile listed there?"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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On the Options dialog, click the Directories tab. Is the directory that contains the
tools.hfile listed there?"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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What happens if you change the
#includestatement so that it contains an absolute path to thetools.hfile?"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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What happens if you change the
#includestatement so that it contains an absolute path to thetools.hfile?"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Change the
#includestatement to also include the absolute path to thetools.hfile, like:#include "c:/some_path/tools.h"
As it currently stands, you are using a relative path.
"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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// nonrec.cpp -- non-recursive filter design // NRLowPass() build NR low-pass filter // NRHighPass() build NR high-pass filter // NRBandPass() build NR band-pass filter #include "tools.h" #include "ltisys.h" // sinc() or sin(x)/x function double sinc(double x) { if (x==0) return cos(x); else return sin(x)/x; } // Create non-recursive low-pass filter by Fourier Transform method LTISystem NRLowPass( double freq, // corner freq (fraction of sampling rate) int ncoeff // # coefficients ) // returns LTI system to specification { int i; // convert frequency double omega = 2 * PI * freq; // build half-sized window from sinc function int nhalf = ncoeff/2; Waveform hwv(nhalf,1.0); for (i=1;i<=nhalf;i++) hwv[i] = omega * sinc(i*omega)/PI; // window with (half-)hamming window for (i=1;i<=nhalf;i++) hwv[i] *= 0.54 + 0.46 * cos(i*PI/nhalf); // create new LTI System LTISystem lpfilt(2*nhalf,0); // copy impulse response into system // (indexed -nhalf .. 0 .. nhalf) lpfilt.a[nhalf] = omega/PI; for (i=1;i<=nhalf;i++) { lpfilt.a[nhalf-i] = hwv[i]; lpfilt.a[nhalf+i] = hwv[i]; } return lpfilt; } // create high-pass non-recursive filter from low-pass prototype LTISystem NRHighPass( double freq, // corner freq (fraction of sampling rate) int ncoeff // # coefficients ) // returns LTI system { // get low-pass version LTISystem hpfilt = NRLowPass(0.5-freq,ncoeff); // now modulate with cos(n*PI) = +1,-1,+1,-1,... int nhalf = hpfilt.a.count()/2; for (int i=1;i<=nhalf;i+=2) { hpfilt.a[nhalf-i] = -hpfilt.a[nhalf-i]; hpfilt.a[nhalf+i] = -hpfilt.a[nhalf+i]; } return hpfilt; } // create band-pass non-recursive filter from low-pass prototype LTISystem NRBandPass( double lofreq, // low corner freq (fraction of sampling rate) double hifreq, // high corner freq (fraction of sampling rate) } int ncoeff // # coefficients ) // returns LTI system { // get low-pass prototype LTISystem bpfilt = NRLowPass((hifreq-lofreq)/2,ncoeff); // now modulate with cos(n*centrefreq) int nhalf = bpfilt.a.count()/2; double cf = 2*PI*(lofreq+hifreq)/2; bpfilt.a[nhalf] = 2 * bpfilt.a[nhalf]; for (int i=1;i<=nhalf;i++) { bpfilt.a[nhalf-i] = 2 * bpfilt.a[nhalf-i] * cos(i*cf); bpfilt.a[nhalf+i] = 2 * bpfilt.a[nhalf+i] * cos(i*cf); } return bpfilt; }
While ask this species questions we prefer to shown only debug window's result will be very easy way to find a solution.
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While ask this species questions we prefer to shown only debug window's result will be very easy way to find a solution.