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# Questions tagged [piecewise]

Questions about the Piecewise function, which is represented by different expressions for different ranges of values of its independent variable.

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### 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 ...
741 views

### Piecewise imposes internal boundaries in NDSolve - is this expected?

In the following code I used True as the predicate for DirichletCondition and found that the boundary condition was applied not ...
794 views

### Colors for multiple piecewise functions

I have the following $3$ piecewise functions, and I would like that f1, f2 and f3 have $3$ ...
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 $t=5$ (...
99 views

I am attempting to add advection to my mathematica model of 2-D Diffusion. I am trying to add a sine-flow vector field, which is A*sin[x] in the y direction and <...
86 views

### Why is Manipulate breaking?

I am trying to manipulate a piecewise function. The first and second piece are attached at point x where x should also be manipulated (basically each curve has it's ...
94 views

### Priority of nested function in Mathematica

I am facing a small problem with the nested function in Mathematica. Please take a look at the attached Code below. ...
139 views

### UnitStep vs HeavisideTheta; KroneckerDelta vs DiscreteDelta

What are the differences between these pairs of functions? In many cases, they seem to act the same. For example, both DiscreteDelta and ...
304 views

### Integration over a (non-parametric) curve defined by indicator function

I want to integrate the real function myFun defined on a 2D plane over the line locus, defined as the solution of a set of ...
226 views

### Different expressions for an integral if I split the region of integration

Consider the assumptions ...
669 views

### Using Boole to integrate over region

I have a complex and long piecewise function to integrate, so I have written a Mathematica script that cuts the whole range of integration, evaluates the integrand in each region and then integrates ...
131 views

### Does Mathematica have this function implemented?

Is there a function in Mathematica that can express a piecewise function in terms of the Heaviside theta function? Say, for example, the solution to this ODE.
261 views

### NDSolve with Piecewise function

I have the following code on Mathematica ...
4k views

102 views

### PiecewiseExpand fails with min of two piecewise functions

I have two Piecewise functions that are (in this case) just the empirical CDFs of two sets of data: ...
401 views

### StreamPlot No Longer Works With Piecewise Function?

Bug introduced in 7.0.1 or earlier and persisting through 11.1 I was trying to plot a phase portrait (StreamPlot) using a piecewise (...