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Triangle sequence
A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

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Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...

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'Undefined Function or Variable' Error when Function is Defined
Looks like the issue is you define cp in the workspace and the function can't access that variable when it gets called. So, try ...

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Use griddata ignoring gaps in data
To interpolate without the gaps you need to remove them from the data before interpolating, request values on the full grid (inc...

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system of 1st and 2nd order differential equations ode45
The documentation explains how to express higher-order equations as first-order equations: <https://www.mathworks.com/help/matl...

presque 9 ans il y a | 0

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Solving coupled differential equations
The immediate problem is that you provide too many output arguments to ode45. The components of y will be returned as columns if...

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Commands related to big data and tall array to annalyze data from .csv files.
Check out the documentation: <http://www.mathworks.com/help/matlab/tall-arrays.html Tall Arrays> The general procedure is tha...

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2nd order numerical differential equation system solving
Use the Symbolic Math Toolbox function <http://www.mathworks.com/help/symbolic/odefunction.html |odeFunction|> to convert the |o...

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I am looking for a way to share the output of my event function with the main function used by the ode solver.
If you specify a terminal event in the event function, then the integration will halt when the event occurs. You can then use th...

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May you help me please to continue my syytem seconder order DE function?
Since you have boundary conditions you'll want to use bvp4c or bvp5c. See <https://www.mathworks.com/help/matlab/math/boundary-v...

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Dynamics of Vibro-Impact system with impact condition
If you use |ode45| then a chunk of your code becomes moot - you just need the initial conditions |y0| and time span |[t0 tfinal]...

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Event function in ode45
My guess is you are using the "old" way to pass parameters to the ODE function F, where they are specified as trailing input arg...

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How do I speed up ODE15s?
Some things to try... # For stiff problems you should always specify the Jacobian or its sparsity pattern via the options str...

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How to find probability density for two data sets plotted on same histogram?
Two ideas come to mind... 1. You can combine the data sets into one so that the normalization takes into account the total nu...

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How to fix: Index Exceeds Matrix Dimensions
The issue is with the line: M(i,:)=noise(P(i):P(i)+10); You want to take the index |P(i)| and grab the next 10 elements ...

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Error message when computing integral: first input argument must be a function handle
If you want to compute the integral symbolically by keeping the line "syms x;", then you'll need to use the function in Symbolic...

environ 9 ans il y a | 6

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How to construct an undirected graph by reading edge by edge from a text file
You can use |textscan| to read the text file into a cell array, with the first entry listing the source nodes and the second ent...

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How to do 2D interpolation
Assuming that |y1| and |y2| are separate functions evaluated at the points in |X|, you are still just doing 1-D interpolation. M...

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problems when adding a column to tall array
In the first case the reason you get an error is because you are attempting to add a tall variable to the table that was created...

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minimize cost function for undirected graph
<http://www.mathworks.com/help/matlab/ref/graph.maxflow.html maxflow> can calculate minimum cuts. Also, <http://www.mathworks.co...

environ 9 ans il y a | 0

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Help with graphs - breadth search
This example should be helpful: <http://www.mathworks.com/help/matlab/math/visualize-breadth-first-and-depth-first-search.htm...

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How to use kmeans function on data stored by datastore function?
Datastore is just a framework for loading small chunks of the data at a time, so you can't call generic functions directly on th...

environ 9 ans il y a | 2

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Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<http://upload.wikimedia.org/wikipe...

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Side of an equilateral triangle
If an equilateral triangle has area A, then what is the length of each of its sides, x? <<http://upload.wikimedia.org/wikipe...

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Dimensions of a rectangle
The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...

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Is this triangle right-angled?
Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

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Area of an equilateral triangle
Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...

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Area of an Isoceles Triangle
An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<http://upload...

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Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

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Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

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