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Martha


Last seen: 約4年 前 |  2014 年からアクティブ

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質問


Find combinations without repetitions from a given set
Hi All, I have a matrix b of size 119x42, I'm trying to find the combinations without repetitions, that results in a vector o...

6年弱 前 | 1 件の回答 | 0

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質問


Constraints not satisfied with 'ga' solver and integer variables
Hi all, I've been struggling to understand what is the problem with my code. I wrote this long time ago, and now I'm using it...

6年以上 前 | 1 件の回答 | 1

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質問


Issues with solve. Cannot solve symbolically. Returning a numeric approximation instead.
Hi there, I'm trying to use 'solve' for 'a' by using 'syms' but I think it always retrieve an answer even if it didn't solve...

7年弱 前 | 1 件の回答 | 0

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質問


Why does FMINCON finds a solution even when constraints are not satisfied?
Hi, I'm using FMINCON solver as I need to set up Nonlinear 'OR' constraints (similar to this:http://uk.mathworks.com/help/opt...

8年弱 前 | 1 件の回答 | 0

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質問


Error with nested function to output history x values of FMINCON
Hello, I want to retrieve the values of x at each iteration of an optimization routine using FMINCON. I've defined a nested fu...

8年以上 前 | 0 件の回答 | 0

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質問


How to use more than one variable as an input for a NonLinear Constraint function with FMINCON
Hello, I have an optimization problem where the number of constraints are subjected to the length of one variable. I'm writin...

8年以上 前 | 1 件の回答 | 0

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質問


Error with FMINCON - Failure in initial user-supplied objective function evaluation
Hi everybody, I'm trying to run an optimization problem with FMINCON, but I keep getting the following error: Error usin...

8年以上 前 | 1 件の回答 | 0

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質問


How to assign gradual color to a 3d line based on values of another vector
Hi all, I want to assign colour to lines plotted between 3dpoints, based on the values of a fourth vector. The values of the f...

8年以上 前 | 1 件の回答 | 0

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Exponential Curve fit data a & b
Thank you both for the answers, Martha

9年以上 前 | 0

質問


Exponential Curve fit data a & b
Hi, I'm trying to run a script automatically, and at some point I need to plot an exponential curve into a set of x and y data. ...

9年以上 前 | 3 件の回答 | 0

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質問


How to create a mask on an image and have the background white?
Hi, I create a mask into an image and I did this: i=roipoly(f1,p1,p2); mask=repmat(i,[1,1,3]); f1(~mask)=1; imshow(f1) ...

10年弱 前 | 1 件の回答 | 0

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質問


Accesing data in a three dimensional matrix using a for loop
Hi, I want to create a for loop to go through each of the pages (20) of a matrix 400x600x20 (called polygons). The matrices 4...

10年弱 前 | 1 件の回答 | 0

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質問


Three dimensional arrays with poly2mask in each page
Hi, I need to create several poly2mask that are of size 612x924 I'm trying to do that with a for loop, I create a matrix 612...

10年弱 前 | 2 件の回答 | 0

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質問


How to flip only some rows inside a matrix?
Hi, I have a matrix xx which is a 6x20 matrix, and I want to flip only the even rows. Im trying this but is doesn't work: ...

10年弱 前 | 3 件の回答 | 0

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質問


How to divide a line into several parts and obtain the coordinates?
Hi, I want to create a small script that can allow me to divide a line into segments and then retrieve me the coordinates of t...

10年弱 前 | 2 件の回答 | 0

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質問


Select all points inside a polygon to create a new matrix
Hi, I have a point cloud matrix x,y and I want to create a new matrix with all the points that are inside a polygon to create a...

10年以上 前 | 2 件の回答 | 0

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質問


How to select all the elements of a point cloud that are aligned at +-45 degrees?
Hi, I have a point cloud in x,y,z coordinates its shape is rectangular, and I want to select all the elements that are near a l...

10年以上 前 | 0 件の回答 | 0

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回答済み
How to select element of an array between two values?
Thanks Walter, Both work very well! Do you know also how to do the same but with several columns?, That is, having < 2800 x ...

10年以上 前 | 0

質問


How to select element of an array between two values?
Hi, I have an array of 2800 elements < 2800 x 1 double >, and I want to create a new array only with the values that are grea...

10年以上 前 | 2 件の回答 | 0

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質問


How to create a vector from a random point cloud?
Hi, I have a point cloud in coordinates 'x' and 'y'. x<4794x588> and y<4794x588>. In general the shape of the point cloud is a ...

10年以上 前 | 2 件の回答 | 0

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質問


How to join several matrices into one matrix?
Hello, I have a variable in a form of a matrix but repeat several times, 4794 rows, 1 column and 588 files, e.g. 4794x1x588 d...

10年以上 前 | 2 件の回答 | 1

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質問


How to change the sign of a whole vector?
Hi, I want to plot the displacements from a compressive test, but my data is in negative sign. I have a vector like this but ...

10年以上 前 | 1 件の回答 | 0

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