Last change
on this file since 17 was
17,
checked in by zhangj, 11 years ago
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To have a stable version on the server.
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-
Property svn:executable set to
*
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File size:
694 bytes
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1 | function rmsFit = qualFit(x1,y1,co) |
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2 | %QUALFIT - Calcule l'écart type de la distance entre la parabole calculée |
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3 | %et les données expériementales |
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4 | % |
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5 | % INPUTS |
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6 | % 1 x1 |
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7 | % 2. x2 |
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8 | % 3. co |
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9 | % |
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10 | % OUPUTS |
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11 | % 1. rmsfit |
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12 | % |
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13 | % See Also bba_last |
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14 | |
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15 | %co=polyfit(x1,y1,2) |
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16 | |
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17 | for i=1:length(x1), |
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18 | cub(1) = 2*co(1)^2; |
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19 | cub(2) = 3*co(1)*co(2); |
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20 | cub(3) = co(2)^2+2*co(1)*(co(3)-y1(i))+1; |
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21 | cub(4) = co(2)*(co(3)-y1(i))-x1(i); |
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22 | |
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23 | solcub = roots(cub); |
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24 | |
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25 | [res,ind] = sort([abs(solcub(1)-x1(i)) abs(solcub(2)-x1(i)) abs(solcub(3)-x1(i))]); |
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26 | |
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27 | xres = solcub(ind(1)); |
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28 | yres = parabole(x1(i),co); |
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29 | x1(i); |
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30 | y1(i); |
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31 | |
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32 | dist(i) = sqrt((x1(i)-xres)^2+(y1(i)-yres)^2); |
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33 | end |
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34 | |
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35 | dist; |
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36 | |
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37 | rmsFit = std(dist); |
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