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POInterpolate a discontinuous function with Scipy
 

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  1. POInterpolate a discontinuous function with Scipy
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    <p>I am having problems interpolating some data points using Scipy. I guess that it might depend on the fact that the function I'm trying to interpolate is discontinuous at x roughly 4.</p> <p>Here is the code I'm using to interpolate:</p> <pre><code> from scipy import * y_interpolated = interp1d(x,y,buonds_error=False,fill_value=0.,kind='cubic') new_x_array = arange(min(x),max(x),0.05) plot(new_x_array,x_interpolated(new_x_array),'r-') </code></pre> <p>The error I get is</p> <pre><code> File "&lt;stdin&gt;", line 2, in &lt;module&gt; File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/scipy/interpolate/interpolate.py", line 357, in __call__ out_of_bounds = self._check_bounds(x_new) File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/scipy/interpolate/interpolate.py", line 415, in _check_bounds raise ValueError("A value in x_new is above the interpolation " ValueError: A value in x_new is above the interpolation range. </code></pre> <p>These are my data points:</p> <pre><code> 1.56916432074 -27.9998263169 1.76773750527 -27.6198430485 1.98360238449 -27.2397962268 2.25133982943 -26.8596491107 2.49319293195 -26.5518194791 2.77823462692 -26.1896935372 3.07201297519 -25.9540514619 3.46090507092 -25.7362456112 3.65968688527 -25.6453922172 3.84116464506 -25.53652509 3.97070419447 -25.3374215879 4.03087127145 -24.8493356465 4.08217147954 -24.0540196233 4.12470899596 -23.0960856364 4.17612639206 -22.4634289328 4.19318305992 -22.1380894034 4.2708234589 -21.902951035 4.3745696768 -21.9027079759 4.52158254627 -21.9565591238 4.65985875536 -21.8839570732 4.80666329863 -21.6486676004 4.91026629192 -21.4496126386 5.05709528961 -21.2685401725 5.29054655428 -21.2860476871 5.54129211534 -21.3215908912 5.73174988353 -21.6645019816 6.06035782465 -21.772138994 6.30243916407 -21.7715483093 6.59656410998 -22.0238656166 6.86481948673 -22.3665921479 7.01182409559 -22.4385289076 7.17609125906 -22.4200564296 7.37494987052 -22.4376476472 7.60844044988 -22.5093814451 7.79869207061 -22.5812017094 8.00616642549 -22.5445612485 8.17903446593 -22.4899243886 8.29141325457 -22.4715846981 </code></pre>
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    1. USMichael J. Barber
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