Dear All,
I find that the extrapolation option for interp1 is not thoroughly documented. In the Arguments section it states, for extrapolation, (optional) string, or real value defining the yp(j) components for xp(j) values outside [x1,xn] interval. In the Description section the only string listed is "extrap" which says: the extrapolation is performed by the defined method But which is the defined method? If one selects the method "spline" it is suggested to refer to interp(), which has a specific argument (called out_mode) with several possibilities for extrapolation. These possibilities aren't accessible from the interp1() function, so it should be completely clear in its documantation which one is used. Besides, the argument extrapolation is optional but it is not clear what happens if it is not used. I suppose it is what appears under "by default", but again it says the extrapolation is performed by the defined method (for spline method) But, as already mentioned, tha spline method has more than one extrapolation strategy, which can be selected from interp but not from interp1. Finally, at least for spline it seems to be no difference between setting the extrapolation argument to "extrap" or not using it. Regards, Federico Miyara -- El software de antivirus Avast ha analizado este correo electrónico en busca de virus. https://www.avast.com/antivirus
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