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1 | #include "madx.h" |
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2 | |
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3 | double |
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4 | vdot(int* n, double* v1, double* v2) |
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5 | /* returns dot product of vectors v1 and v2 */ |
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6 | { |
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7 | int i; |
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8 | double dot = 0; |
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9 | for (i = 0; i < *n; i++) dot += v1[i] * v2[i]; |
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10 | return dot; |
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11 | } |
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12 | |
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13 | double |
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14 | vmod(int* n, double* v) |
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15 | { |
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16 | int i; |
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17 | double mod = 0; |
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18 | for (i = 0; i < *n; i++) mod += v[i] * v[i]; |
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19 | return sqrt(mod); |
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20 | } |
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21 | |
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22 | void |
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23 | zero_double(double* a, int n) |
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24 | /* sets first n values in double array a to zero */ |
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25 | { |
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26 | int j; |
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27 | for (j = 0; j < n; j++) a[j] = 0; |
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28 | } |
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29 | |
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30 | |
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