Recent questions tagged matlab

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All I want to do is make the width greater and the height smaller. I'm just doing raster plots but this ... the right size to start with. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Deleting matrix elements by = [] vs reassigning matrix

Is there any difference between these two methods for deleting elements in Matlab: ElementsToDelete = [0 0 ... they completely interchangeable? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Sweep / chirp signal ends at incorrect frequency

I'm creating a sweep / chirp signal using matlab / octave and my ending signal seems to be ending at the wrong ... I'm using octave 3.8.1 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How does this code for standardizing data work?

I have a provided standardize function for a machine learning course that wasn't well documented and I'm still new to ... std_X(:, i); end end See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How do I get the second return value from a function without using temporary variables?

I have a function that returns two values, like so: [a b] = myfunc(x) Is there a way to get the ... this: abs(secondreturnvalue(myfunc(x))) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Get the indices of the n largest elements in a matrix

Suppose I have the following matrix: 01 02 03 06 03 05 07 02 13 10 11 12 32 01 08 03 And I want the ... the cleanest way to do this in MATLAB? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How can I count the number of elements of a given value in a matrix?

Does anyone know how to count the number of times a value appears in a matrix? For example, if I have a 1500 ... Saturdays(7) are stored in M? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Resize an image with bilinear interpolation without imresize

I've found some methods to enlarge an image but there is no solution to shrink an image. I'm currently ... the imresize function in MATLAB? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Replace specific columns in a matrix with a constant column vector

For neural networking, I would like to represent a column vector y = [1;2;3] in a matrix like so: y = [ ... is there another way to solve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - [caffe]: check fails: Check failed: hdf_blobs_[i]->shape(0) == num (200 vs. 6000)

I have the train and label data as data.mat. (I have 200 training data with 6000 features and labels are ... ! Any advice would be appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Fortran minimization of a function with additional arguments

In fortran I have an external optimization routine that takes as an input the function f(x) and the starting ... no anonymous function. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Suppress Output

I want to suppress the output of variables in a set of Matlab functions. The problem is that the author forget ... off this kind of output? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How to build mex file directly in Visual Studio?

I have a Visual Studio 2010 solution that contains a library of functions, and I would like to be able ... build a mex file for contemporary MATLAB releases? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Automatically plot different colored lines

I'm trying to plot several kernel density estimations on the same graph, and I want them to all be different ... % plot with a different color each time end Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How can I change the values of multiple points in a matrix?

I have a matrix that is [500x500]. I have another matrix that is [2x100] that contains coordinate pairs that could be ... 70; 30,50,70]; mtx(co_ords) = 0; Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Create a zero-filled 2D array with ones at positions indexed by a vector

I'm trying to vectorize the following MATLAB operation: Given a column vector with indexes, I want a matrix with the same ... :)) = 1; but it doesn't work. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Getting FFT peaks from data

I am developing a speech recognition system from scratch using Octave. I am trying to detect phonemes by detecting ... values (the peaks of the graph)? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Index of max and min value in an array

How can I find the index of the maximum element in an array without looping? For example, if I have: a = ... (a) would return 3. Likewise for defining indexMin. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Difference between accessing cell elements using curly braces and parentheses

What is the difference between accessing elements in a cell array using parentheses () and curly braces {}? For ... is, reduced the cell element count by 1. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How do I access structure fields dynamically?

I have a structure with many fields which are vectors of different lengths. I would like to access the fields ... . Is there a better alternative to that? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How to training/testing my own dataset in caffe?

I started with Caffe and the mnist example ran well. I have the train and label data as data.mat. (I have ... Many thanks!!!! Any advice would be appreciated! Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Use a vector as an index to a matrix

I'm writing a MATLAB function to read out data into an n-dimensional array (variable dimension size). I need to be ... use a vector as the points in an index? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Find given row in a matrix

I have an m by n matrix in MATLAB, say M. I have an n-element row vector, i.e. a one by n column matrix, ... row somewhere in M. How can I find the index in M? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Sort a matrix with another matrix

Suppose I have a matrix A and I sort the rows of this matrix. How do I replicate the same ordering ... to MATLAB programmers anymore thanks to JITA (perhaps). Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How do I visualize a matrix with colors and values displayed?

I want to create images like this from a double precision matrix using MATLAB. Sample image: http://twitpic.com/2xs943 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - On shape-agnostic slicing of ndarrays

In this post, I'm using the term slice to refer to a subarray B_i of an n-dimensional array A such that ... achieve the same result (in a shape-agnostic way)? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Saving time and memory using parfor?

Consider prova.mat in MATLAB obtained in the following way for w=1:100 for p=1:9 A{p}=randn(100,1); end ... loading once at the beginning, but maybe I'm wrong. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How can I convert an RGB image to grayscale but keep one color?

I am trying to create an effect similar to Sin City or other movies where they remove all colors except one from an image. ... y, x ); end end end imshow(im); Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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