# All Questions

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1answer
56 views

### Cells[] ignoring multiple style cells

Bug introduced in V9 and fixed in V11 Same story as in NotebookImport ignoring multiple style cells, ...
2answers
1k views

### Probability density histogram with unequal bin widths

I am confused by output of Histogram and HistogramList for probability density ("PDF") when ...
1answer
167 views

### Images in package Not visible

I want to make a package where some variables are initialized to images. but when i save the package, all images are in the form of ImageData that are very long. ...
1answer
221 views

### Count intersections of two non-polynomial functions [duplicate]

I have two Bessel functions, and I need to be able to count the number of intersections if both functions are plotted dependent upon the same variable. I can use FindRoot or FindInstance to get one ...
2answers
253 views

### Having problems integrating a function of a complex variable [closed]

I've tried to calculate the integral And I got the result $16i \pi ^3$. I wanted to check my calculation, so I ran this code in Mathematica: ...
1answer
87 views

2answers
320 views

### Plotting amplitude spectra of modulated message signal

I'm trying to plot the amplitude spectrum of the modulated message signal, I have managed to plot it by working through the maths, expanding out each trig function, and then drawing onto a graph ...
1answer
373 views

### Piecewise function on boundary condition

Consider this initial-boundary-value problem: $$\frac{\partial u}{\partial t}=\frac{\partial^2u}{\partial x^2}+\frac{\partial^2u}{\partial y^2},\quad \Omega=(0,1)\times(0,1),\quad t>0.$$ u(x,0,t)=...
2answers
332 views

### Find NullSpace of a very sparse symbolic matrix

Below is a matrix diagram, produced in Mathematica. In this case it's a $956\times 950$ rectangular matrix. The white parts are all zero. ...
1answer
153 views

### Why does it matter at what point I replace?

I need to find four orthogonal linear combinations of complicated functions, that vanish at four different points. I use (LK4 is defined below, but its shape should have nothing to do with my problem)...
1answer
159 views

### How to make the result of Piecewise be a closed interval?

Description This question comes from two questions. Namely Q1 and Q2 The defintion of B-Spline basis function as shown below: Let $\vec{U}=\{u_0,u_1,\ldots,u_m\}$ a nondecreasing sequence of real ...
2answers
159 views

### How to loop over a varible while plotting a function

Suppose three functions : k1[s_, d_,m_] := 3 s + 5 d + m k2[s_, d_] := 5 s - 7 d k3[s_, d_,m_] := s + d - m How to add the following code to plot conditional <...
1answer
568 views

### Define a Recurrence Table involving other tables

I'm relatively new to using Mathematica. Previously I used Matlab, but lately I noticed that the numbers i got in both of them do not match (mostly it seems that Matlab lacks precision...). The ...
1answer
2k views

### Why doesn't my Manipulate work?

I am new to Mathematica and reading my way through a few books. Playing around with Manipulate and I noticed the following does not work: ...
1answer
88 views

### Evaluating Residue at pole with different forms

I want to evaluate residues at the poles of the function $\frac{1}{z^{3/2}+r^{3/2}}$ fun = 1/ (z^(3/2) + r^(3/2)); where z ...
2answers
223 views

### Error Resulting from Placing a Dynamic Variable inside of Table

I want to create a list of values, True or False, and to update those values with a Checkbox....
2answers
182 views

### How to extract matrix which produces given symbolic linear combinations?

Suppose I have a column matrix $\alpha$, consisting of some symbols ...
2answers
809 views

### How to change the axis on this ListPlot?

My bifurcation diagram almost works, but I can't figure out how to replace the point number on the horizontal axis with the x coordinate from my calculation. I have tried a whole bunch of things that ...
1answer
65 views

### Out labels looks strange after turning on magnification [duplicate]

As everything in Mathematica looks too small to me, so I turned on magnification when I am working. It looks good on windows: However, the Out tag is dislocated ...
2answers
342 views

### Extract data from DateListPlot, limited by PlotRange

Extracting the points from a line in a ListPlot in this answer uses points = Cases[Normal@plot, Line[pts_] :> pts, Infinity]; This works in DateListPlot (...
0answers
45 views

### DensityPlot, ScalingFunctions, and small values

Edit: I figured out I can use Rescale to retrieve the plot as well as get the correct plot legend. I still can't figure out how to rescale the axes from 10^-9 to 1 ...
1answer
475 views

### How could I define function with function such as Coefficient? [duplicate]

For example, I have eq1=ax+by+cz; and then I want to define new function, $eq2$, as eq2[x_]:=Coefficient[eq1,a]; eq2 ...
0answers
213 views

### Compute second functional derivative with VariationalD?

I have problems to compute the second functional derivative of a general function. The following lines generate the first derivative: ...
1answer
494 views

### Plotting a best fit line for listloglogplot data

After playing around with calculating the Overlapping Allan Deviation for my research project (and with much help from this community), I have finally resolved a correct listloglogplot for simulated ...
2answers
184 views

### Mathematica code in fortran [closed]

I have an integral in which the integrand is a combination of ratio of modified bessel function of second kind. I am able to find the solution of this integral with mathematica Nintegrate module with ...
0answers
497 views

### No response from DSolve

Using optimal control theory, I am trying to find the optimal paths of d and k such that they will maximize profit as given by lc: ...
1answer
206 views

### Improving strategy to solve this constrained root-finding problem

I am looking for roots of the function eqs defined below. It has $2k$ unknowns and returns a vector of $2k-1$ components. The sole purpose of the following block ...
2answers
116 views

### Setting a relative directory

I'm having trouble with SetDirectory. Practically, I need to get the following code working: ...
4answers
286 views

0answers
161 views

### Using Control Objects with TabView [duplicate]

I have a number of different tabs on my 'dashboard'. Each tab has a few different Controls (drop down boxes) that the user makes selections with. These selections determine what is displayed on the ...

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