All Questions

234 views

Replacing elements of a nested list by some value

I have a list of list ...
137 views

Counting the number of instances where items at the same position in two matrices are equal?

Given two matrices having the same dimensions: m1 = {{1, a, 2}, {4, 5, 0}, {g, a, d}} m2 = {{1, b, 2}, {7, 2, 0}, {a, a, a}} Is there a built-in function that ...
19 views

game theory subgame perfect equilibria [migrated]

Let s be a strategy pro le in an extensive game with perfect information 􀀀; let h be the current history, i.e. the sequence of actions taken by the players. let P(h) be the player to play next after ...
49 views

Frame text is cropped while exporting as EPS

I have generated an eps file with using Export["filename.eps", figure, "eps"], but the text on the frame labels and tick numbers are cropped like this: Screenshot ...
64 views

Bar Graph - Compress/Shorten some elements

I have a bar graph that I'm plotting. Some of the values are very large when compared to others. I want to put more focus on the smaller values, while still showing the larger elements. The reason I ...
49 views

Export data from NDSolve when they meet a certain condition

I need to export to a txt file the data from the following system of equations: ...
74 views

Drawing disk with coordinates from NDSolve

I have simple Manipulation expression, but continuously getting error Coordinate {x[0.], y[0.]} should be a pair of numbers, or a Scaled or Offset form. I assume that something is wrong with ...
55 views

Dynamic interaction with a 3D plot

I have a function: C = 0.0625 + 0.0008*X - 0.0232*Y - 0.0157*Z + 0.0059*X^2 + 0.0112*Y^2 + 0.0160*Z^2 - 0.0063*X*Y - 0.0243*X*Z + 0.0211*Y*Z This equation ...
89 views

How to make several DateListPlot have the same scale?

I want to plot some weather data series. Unfortunately the series were collected in different episodes, from which some overlap. I would like to plot them as different plots in a column, but with ...
144 views

QuantilePlot silliness

When I do a quantile plot of two large data sets (in my case, each of them of size around 3 million), the resulting notebook cell is huge, and if you save it as PDF, the resulting PDF is 13MB in size. ...
298 views

How can I obtain a smooth curve from my data but preserve two inversion points

I have a list of data points, {x, y}, my data. When I plot them, the curve is jagged. I want to smooth the curve and preserve the two sharp corners. This is a plot ...
98 views

I am a new user and i would appreciate your help to visualize the 3D of the following function. Also, i need more rep to add a picture. Thank you. For every odd number on the form $n=pq$, where ...
15 views

Sum of angles of Triangle greater than 180 [migrated]

Can we prove that sum of angles of triangle is greater than 180. -assumptions are allowed. If you have any suggestion please let me know
49 views

114 views

Using Predict on images

I have a dataset of some (grayscale) images (stored as a list in inputImages) varying in size and content (this is example data from Wolfram, so you can run the ...
51 views

Vertical direction in images

Mathematica's relatively new Image structure and related functions are very useful, but it is a great disappointment that they adopted the convention that the first row is at the top of the image. ...
57 views

what to do when NSolve does not solve

f = 696.1125540355472 + 3.9668099604385043 x + LogGamma[1 + x] - LogGamma[169 + x] Plot[f, {x, 0, 10}] Solve[f == 0, x, Reals] NSolve[f == 0, x] I know that the ...
75 views

Use the value of cell in a table as the argument to a function

I just got mathematica from my school and I'm trying to learn the basics. How could I use the value of a cell in a table (as in Insert->Table) and pass it as an argument to another cell in the table? ...
50 views

Proper way to run a Mathematica script (-script vs -run vs MathematicaScript vs <)?

Suppose I have a Mathematica script called test.m. There at least 4 ways to run this from the terminal: ...
57 views

Error when implementing StartProcess[] in loops (Do, While, Table)

I'm using Mathematica to control another program (Surface Evolver) through the terminal (ie using StartProcess[]; and ...
49 views

How can I set a RadioButton to invoke an action, like a Button can?

In Mathematica one can create a Button which, when clicked, invokes an action. For example... ...
64 views

Error messages from TensorContract and TensorReduce

I am struggling with a few errors when using symbolic tensors. I am using mathematica 9.0.1.0, linux x86. The following code generates what seems to me an incorrect tensor, this is the smallest ...
36 views

Why NDSolve With Orthogonal-Projection Method On Orr-Sommerfeld Equation Does Not Work(?)

I am attempting to solve the Orr-Sommerfeld equation for plane Poiseuille flow with the Orthogonal Projection method within NDSolve. The Orr-Sommerfeld equation is (a "stiff" problem); \$\psi''''(x) ...
131 views

Sublist pattern matching

Is there any way to simplify the following pattern: {p___, {a___, x_, x_, b___}, q___} :> {p, {a, x, b}, q} Ie. where I remove duplicated elements within ...
55 views

How to work with decimals (e.g. 0.95) instead of fractions (95/100) and get the same result

In my code I have a function, F, that depends on several parameters, say a,b,c: F(a,b,c). I need to give a grid of values to a,b and c to obtain the value of F. My grid of values are decimal ...
121 views

How to use the same PlotRange and the same PlotLabel size for a sequence of Graphics?

I wish to use ListAnimate to show a sequence of plots with different plot ranges and differently sized plot lables, all unknown in advance, in a way that keeps the ...
256 views

Applying different functions to different columns of a Dataset

Suppose I have different functions: Total, Mean and Max and the following ...
79 views

Connecting to LeapMotion

Thanks to those who helped me with my previous question. I will help others too where I can. In the meantime I have a general question whether anyone has had success connecting Mathematica to the ...
147 views

Time value of Money Functions combined

I am trying to combine multiple functions into one. I have defined following functions: (PV refers to Present value, FV refers to Future value, i or IPER refers to interest per period, pmt refers to ...
31 views

Error following a variable in an ODE [closed]

I am trying to solve a 4th order differential equation and this is my code thus far ...
56 views

Reconstructing an expression [duplicate]

I have a nested expression like this one expr = Tan[Sin[Cos[x]]]; I can deconstruct it with ...
114 views

Finding the position of a single array in a list of arrays that contains wildcard variables

Consider two lists: superList = {{wc,wc,1,wc,wc}, {wc, wc,2, wc, wc}, {wc, wc, 3, wc, wc}, {wc, wc, 4, wc, wc}}; littleList = {a,b,3,c,25}; In ...