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# Joanie

Last seen: 2 years ago Active since 2014

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How to use if statement with ode23
I have a formula in the form of: dy/dt = f - a*y f(t) = x-k*t I can use the ode23 function to solve this for both: ...

5 years ago | 1 answer | 0

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Question

Find if lines intersect
I have a matrix containing data for points on a vector v = [x;y]. let's say: % M = [v1_x1 v1_x2 v1_y1 v1_y2; v2_x1 v2_x2 v2...

5 years ago | 1 answer | 0

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Question

Solve Ax=b with LU factorization
I'm trying to solve A*x = b with LU decomposition and back substitution. Where x is the unknown vector. A = 350 ...

5 years ago | 1 answer | 0

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Question

display extra value in datacursor
Is there a way to add other values to the datacursor? So besides x and y. I have an array with x and y values and a value d. ...

8 years ago | 1 answer | 0

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Question

How can I select a part of an array between NaN values
For example I have an array like this: T = [NaN NaN; 1 3; 2 4; 5 6; 8 7; NaN NaN; NaN NaN; 4 5; 6 7; NaN NaN; NaN NaN; 1 2;...

8 years ago | 1 answer | 0

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Question

how can I get the max of the values between NaN's in an array
I have an array like this one: T = [NaN NaN; ... 1 3; 2 4; 5 6; 8 7; NaN NaN; NaN NaN; 4 5; ...

8 years ago | 3 answers | 0

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Question

How can I find matching rows from three out of four colomns
I have a matrix with 4 columns, x y z and D, and a lot of rows. I want the program to find the rows where x, y and z are the s...

8 years ago | 2 answers | 0