#include<stdio.h>
#include<math.h>
#include<stdlib.h>
int main(){
int i=0,k=0,n=0;
double sum=0,cossum=0,sinsum=0,data[1024],delta=10.0000E-06;
FILE *fp;
char csvdata[256];
if ((fp = fopen("data.csv","r")) == NULL){
fprintf(stderr,"No such file (%s)\n","data.csv");
exit(1);
}
while(fgets(csvdata,256,fp)!=NULL){
data[i]=atof(csvdata);
i++;
printf("%f\n%f\n",data[i],atof(csvdata));
}
fclose(fp);
while(k<512){
cossum=0;sinsum=0;sum=0;
while(n<1024){
cossum+=(data[n]*(cos(2*M_PI*k*n/1024)));
sinsum+=(data[n]*(sin(2*M_PI*k*n/1024)));
n++;
}
sum=pow(delta,2)*(pow(cossum,2)+pow(sinsum,2));
/* printf("%f\n",10*log(sum));*/
k++;
}
}
おうぎゃ
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No.14667 - 2008/05/09(Fri) 16:45:15
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