Recent questions tagged MATLAB

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matlab - increasing the resolution of a grayscale image

I have a grayscale image, and need to increase its resolution. How can this be done in MATLAB? Would it ... of the image for instance? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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589 views

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matlab - Given a mask, how do I get obtain the original colors of an image?

I have converted my image into a mask and I would now like to obtain what the original colours were given this mask ... = originalImage(:,:,1); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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766 views

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matlab - Vectorize summing values that belong to a group

Is it possible to vectorize a loop that goes through different index mappings? For example: a = zeros(1, 5); ... be done without the for loop? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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matlab - Concatenating 2D plots

I have several 2D-plots in MATLAB. In each plot there are some lines (each line is a row-vector of values ... how to create its legend? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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739 views

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matlab - How to directly pass multiple outputs of a function to another?

Let me elaborate with examples: We know how to easily combine functions with a single output: a = sin( ... to the second function separately. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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868 views

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matlab - Index exceeds matrix dimensions when finding max value

I have been trying to find the max value from an array. But I keep getting the following error. Please ... ?? Index exceeds matrix dimensions. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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765 views

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matlab - imshow() displays a white image for a grey image

I have computed an image with values between 0 and 255. When I use imageview(), the image is correctly displayed, ... ): Can some one help me? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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955 views

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matlab - An elegant way to get the output of `normxcorr2` in a manner similar to 'conv2' - (removing the unwanted edges)

Is there an elegant way in Matlab to get the output of normxcorr2 cropped to the size of the image ... image argument before running normxcorr2. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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784 views

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matlab - Replicate vector and shift each copy by 1 row down without for-loop

I would like replicate a vector N times to create a matrix with each copy shifted 1 row down. See image (first ... create an N x 5 matrix. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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729 views

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matlab - Generate numbers randomly from a set?

In MATLAB, I have a set of P numbers. I would like to generate a random array of size N from this set. For ... I am missing a simple hint here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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796 views

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matlab - Finding the maxima of a function using ODE45

I'm trying to locate the locations of one of the equations in a system of differential equations in MATLAB.I'm trying to ... 3,1) = 0. Thank you See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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757 views

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matlab - How to remove zero columns from array

I have an array which looks similar to: 0 2 3 4 0 0 7 8 0 10 0 32 44 47 0 0 37 54 0 36 I wish ... 54 10 36 How can I remove all zero columns? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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743 views

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matlab - Grouping matrix rows in terms of one column

First of all it is really hard for me to describe the problem really good but I'll try. Say that ... functions that uses parallel processing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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593 views

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matlab, how do i write a statement that will give me time on xaxis from y=0.3

x=[0:.01:10]; y=(x.^2).*(exp(-x)); plot(x,y), grid y1=max(y); xlabel('TIME'); ylabel(' ... time at when y=0.3 please assist thank you See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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752 views

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matlab - Change for loop index variable inside the loop

I need to change my loop variable inside the iteration as I have to access array elements in the loop which is ... I accomplish this in Matlab? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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768 views

1 answer

matlab - Plotting with respect to minutes as formatted time (min.sec)

I'm trying to plot some data with respect to minutes instead of seconds in Matlab as formatted time, i.e. ... from the serial port. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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889 views

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matlab - Non overlapping randomly located circles

I need to generate a fixed number of non-overlapping circles located randomly. I can display circles, in this case 20, ... [1,1,1]) Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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757 views

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matlab - Given a vector a=[1,2, 3.2, 4, 5] and an element x=3 In vector a, how to find the exact entry which is bigger than x?

Given a vector a=[1,2, 3.2, 4, 5] and an element x=3 In vector a, how to find the exact entry which is bigger than x? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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825 views

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matlab - How to declare variables immune to clear all?

Is there anyway to declare variables immune to clear all in MatLab? One solution I thought of was saving the ... much, but you never know. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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735 views

1 answer

matlab - Summing up till a certain interval

How can I compute the summation of an interval. I will use Matlab's code for eg. data=[1;2;3;4;5;6;7;8; ... I get about this? (Using for loop) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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711 views

1 answer

matlab - Plot many horizontal Bar Plots in the same graph

I need to plot a x-y function, that shows the histograms at x-values. Something similar to the bottom plot of ... I do that for barh? thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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819 views

1 answer

matlab - How to shift zero in the last column of a matrix

I have one matrix like below- A=[1 1 1 1 1; 0 1 1 1 2; 0 0 1 1 3] But I want to place all ... How can I do this? Matlab experts please help me. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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662 views

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matlab - How do I find the indices of a given array A1, *any* of whose values are practically equivalent to *any* of the values of a second array A2?

By "practically equivalent", I mean that their distances are of order epsilon apart (or 0.000001). Equality in MATLAB ... size(A1) != size(A2) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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709 views

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matlab - Plot normalized uniform mixture

I need to reproduce the normalized density p(x) below, but the code given does not generate a normalized PDF. clc, ... . pdf = pdf/sum(pdf); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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762 views

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matlab - Mapping image into cylinder or sphere shape?

So lets say I have black & white image that is read with imread() command and saved into matrix A. I want to ... I need to do this in MATLAB. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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795 views

1 answer

matlab - Removing stop words from single string

My query is string = 'Alligator in water' where in is a stop word. How can I remove it so that I get ... like to remove all possible stop words. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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822 views

1 answer

matlab - Matching axes scales

I have 3D data plotted using the 'plot3' function. I would like to constrain the Y and Z axes such that ... Z axes are equivalent in scale. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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701 views

1 answer

matlab - How to know a dimension of matrix or vector in R?

I want to find the function in R which does the same as the function size in Matlab. In Matlab, if A = [ ... solve this problem. Thanks a lot. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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