Linked Questions

6
votes
2answers
2k views

How and when to use Evaluate?

A month ago, I used Mathematica to solve my experiment of the Test Technology of Mechanics Engineering. The exeriment is mainly about the Fourier Transform and verify the validity of the theory of ...
6
votes
1answer
2k views

Why does the replace all (/.) evaluate differently in plot

I'm plotting this function: Plot[(2 (l/2 π)^2 ((2 π f)/c)^2 /. {f -> (f 10^9), l -> .01, c -> 3 10^8}), {f, 17.5, 26.5}] but it does not plot ...
6
votes
1answer
2k views

Behavior of expression evaluation in Plot

I'm confused with Mathematica's way of parsing expressions. I've been struggling with this for a while and never found an exhaustive answer, sometimes things don't parse the way I think they would ...
6
votes
1answer
766 views

PlotStyle does not work when plotting a non-evaluated list of functions [duplicate]

When a list of functions is passed to Plot in an unevaluated form (e.g. with Through), the result is a plot with single color. <...
6
votes
2answers
2k views

Speeding up mathematica by subsitituting numerical values

According to this Wolfram Blog post, one can speed up Mathematica code by substituting numerical values as soon as possible. How does one substitute before the main expression is evaluated? The ...
5
votes
5answers
930 views

Plot all curves in a table with a single color

I want all of my solutions in a table to be the same color. My attempt: ...
5
votes
2answers
495 views

Why does Plot only sometimes use different colors for each curve [duplicate]

In this example Plot does not color each curve differently: Plot[{vx0 Sin[t], vy0 Cos[t]} /. {vy0 -> 1, vx0 -> 1}, {t, 0, 12}] but in this example it does: ...
5
votes
2answers
2k views

How to assign different colors to list plotted in ParametricPlot? [duplicate]

Possible Duplicate: Difference in Plot when using Evaluate vs when not using Evaluate I am plotting galaxies and I would like to color them according to their redshift values using a temperature ...
5
votes
2answers
314 views

“Not a valid Filling specification” error

I have a function, which plots the given function array f. This is a part of the function: ...
5
votes
1answer
1k views

Fitting one function to another

I'd like to see how close I can fit an exponential function to a cosine function in the domain of $\;-\frac{\pi}{2}$ to $\frac{\pi}{2}$ in the least squares sense. ...
5
votes
2answers
188 views

Different results with Plot option “Evaluated” in V9 and V10

Consider this example: Plot[Table[BesselJ[n, x], {n, 2}], {x, 0, 10}, PlotLegends -> {"n=1", "n=2"}, Evaluated -> True] The results in MMA v9 & V10 ...
4
votes
2answers
2k views

Parametric plot of multiple graphs on the same axes

I'm trying to plot on a single axes system multiple graphs but ran into a problem when tryinf to label my graphs. Here's what I've used so far Mathematica code: ...
4
votes
2answers
176 views

Losing control over StreamStyle

I solved Laplace's equation over a square region. There are Dirichlet BC's (the top wall is fixed at 100, the other walls are fixed at 0). Plotted result of Laplace's equation is below: I took the ...
4
votes
1answer
523 views

How I style and label individual curves in a ParametricPlot? [duplicate]

I have what I think is a ParametricPlot that is no different in structure from the example for explicitly styling different curves provided in the documentation: <...
3
votes
3answers
745 views

Help on evaluation control?

I want to plot series of slopes: x, 2x, 3x, 4x, 5x, 6x... I'm trying to do this: ...

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