# All Questions

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### Continuous non-piecewise equivalent of smoothstep function?

I have a smooth step function given by the piecewise function ...
121 views

### This PDE freezes Mathematica

I have a problem when I try to solve this PDE: ...
117 views

### InterpolatingFunction::dmval error in the Piecewise function with an interpolation funcion included

I have a set of data, first I deal the data with an Interpolation function. excitef1 = Interpolation[ps1] Then I use a Piecewise function to expand the range of ...
92 views

### Motion study using initial conditions

I think I'm making a mistake to reach my goal. I would like to find an $x[t]$ function that could describe the following conditions: 1 - The object is in position $x=151$ (meters) at time $t=5$ (...
409 views

### InterpolatingFunction within Piecewise gives range error?

So I have a function myfun with positive domain that I got from NDSolve and a bunch of transformations afterwards. I can plot it on its own like ...
284 views

### How to use interpolating functions in NSolve with a piecewise function?

I have a system of two non-linear differential equations that are piecewise, the solutions of which I would like to use to obtain the values of a third variable that is also piecewise. I have trouble ...
602 views

### NDSolve with an interpolating function in Piecewise

Again I have question I hope someone can answer. I made a very simple example illustrating my more difficult problem. I want to solve a differential equation numerically with a conditional in the ...
916 views

### Extract function from a parametric interpolating function

I've read the answers of How to make use of an interpolating function outside of Mathematica?, Interpreting the interpolating function and saving data to plot with external program, Extracting the ...
Given some data pairs $(x_i,y_i)$, with $i=0,...,m$, and a degree $r$, I wish to build a piecewise polynomial function to interpolate these data. That interpolation should be continuous, and, on every ...