17 lines
290 B
C
17 lines
290 B
C
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void sprsax(sa,ija,x,b,n)
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float b[],sa[],x[];
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unsigned long ija[],n;
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{
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void nrerror();
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unsigned long i,k;
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if (ija[1] != n+2) nrerror("sprsax: mismatched vector and matrix");
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for (i=1;i<=n;i++) {
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b[i]=sa[i]*x[i];
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for (k=ija[i];k<=ija[i+1]-1;k++)
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b[i] += sa[k]*x[ija[k]];
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}
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}
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