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# David Arnold

### College of the Redwoods

Last seen: 5 maanden ago Active since 2011

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Notes for Linear Algebra using Matlab
Lecture notes for Linear Algebra using Introduction to Linear Algebra with Applications by DeFranza and Gagliardi.

Submitted

Notes for Differential Equations using Matlab
Examples from Differential Equations by Polking, Boggess, and Arnold

How can I plot an intersection volume?
Here's a helpful starting image: We can see that tan(phi)=1/sqrt(3), so phi=pi/6. Now, here's my code to draw the region usin...

meer dan 3 jaar ago | 0

Question

Drag a point on a curve
Here is my code: xmin=0;xmax=3; ymin=0;ymax=3; x=linspace(xmin,xmax); y=1/3*x.^2; plot(x,y) hold on ...

bijna 4 jaar ago | 1 answer | 0

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Question

Quiver vector length difficulty
I've written this: [T,Y]=meshgrid(-4:0.5:4,-4:0.5:4); S=-(2-Y).*Y; L=sqrt(1+S.^2); quiver(T,Y,1./L,S./L) axis t...

bijna 4 jaar ago | 1 answer | 0

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Question

dfield8 on Matlab2017b
Anybody have a version of John Polking's dfield8 that works on Matlab 2017b?

bijna 4 jaar ago | 1 answer | 0

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Using a mupad plot command from the Matlab console
Is it possible to use a mupad plot command from the Matlab console or editor? I tried: evalin(symengine,'plot(sin(x),x=0...

bijna 8 jaar ago | 1 answer | 0

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Question

Hi, I am brand new to Mupad, reading the documentation, trying examples. I'm thinking about using it n the classroom, but ...

bijna 8 jaar ago | 0 answers | 0

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Question

Deleting commands for running function in editor
Version 2012b on Mac Snow Leopard 10.68. I don't seem to be able to delete commands from the run icon for running a function ...

bijna 8 jaar ago | 0 answers | 0

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Substitute an array of number for a symbolic variable
Hi, I have: syms x y f=x^3+y^3+3x^2+2y^2+9 fx=diff(f,x) now, I'd like to substitute these two vectors of x and ...

ongeveer 9 jaar ago | 2 answers | 0

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Plot contours at a level I wish
Excellent! May I ask one more question? When I change the paper size and position, then rotate the view, the axis labels (in thi...

meer dan 9 jaar ago | 0

Question

Plot contours at a level I wish
All, I have the following code: close all clc N=linspace(10,110,40); P=linspace(10,70,40); [N,P]=meshg...

meer dan 9 jaar ago | 2 answers | 0

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Question

helpdesk font
Hi, When I open helpdesk, the font is too small for me eyes. I tried the various font options in preferences, but the helpdes...

bijna 10 jaar ago | 0 answers | 0

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Question

Bifurcation GUI
All, I've written a little gui to show the bifurcation that occurs as H increases in the differential equation involving logisti...

bijna 10 jaar ago | 0 answers | 0

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Bifurcation GUI
All, Has anyone done a bifurcation gui in Matlab, something along the lines of: http://demonstrations.wolfram.com/Bifurcat...

bijna 10 jaar ago | 2 answers | 0

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Exporting image to bounded pdf
I want to thank everyone for their help on this question. I am now going to close the question. Thanks so much. David.

bijna 10 jaar ago | 0

Question

Exporting image to bounded pdf
If I do this: set(gcf,'PaperPosition',[0,0,4,3]) print -depsc2 filename.eps I get a nice image I can include in a latex d...

bijna 10 jaar ago | 4 answers | 0