Recent questions tagged matlab

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matlab - How to solve && operands to logical scalar

After I run the code in matlab, I encounter this error and unsure how to solve it. How can I solve this problem. ... abs(dIx) - abs(dIy); end 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 - How to return a float value from a mex function, and how to retrieve it from m-file?

I understand that all the returned values of a mex function are stored in plhs array of type mxArray*. I want ... m-file is much appreciated. 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 - How can I customize the positions of legend elements?

I have a figure with several plots and a legend. Is it possible to change the arrangement of the elements in ... you make a two-column legend? 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 - How to implement floating point division in binary with no division hardware and no floating point hardware

I am wondering how to implement IEEE-754 32-bit single precision floating point division in binary with no ... division on the mantissas? 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 - Computing a moving average

I need to compute a moving average over a data series, within a for loop. I have to get the moving average ... with it? My sincerest 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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matlab - rectangular pulse train in python

I'm trying to implement a rectangular pulse train in python. I searched scipy and there is no signal that ... this signal in python? 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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matlab - Homographic image transformation distortion issue

I am trying to transform an image using a 3D transformation matrix and assuming my camera is orthonormal. I am ... deg']); axis square end 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 - Replace values in matrix with other values

I have a matrix with integers and I need to replace all appearances of 2 with -5. What is the most efficient way ... = -5, which does not work. 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 - C# Process Start needs Arguments with double quotes - they disappear

I'm trying to run a cmd line application from c# using Process.Start(ProcessStartInfo); The problem is, ... optional1value" etc. Thanks again. 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 - Count number of values in matrix within given range

I have matrix A=[2 3 4 5 6 7; 7 6 5 4 3 2] I want to count how many number of elements have a value greater than 3 and less than 6. See Question&Answers more detail:os...

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

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525 views

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matlab - Drawing sine wave with increasing Amplitude and frequency over time

I am trying to plot a sine wave where the amplitude increases over time and the frequecy increases over time as well. I ... 1000,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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586 views

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matlab - vectorizing a nested loop where one loop variable depends on the other

I've recently learned how to vectorize a "simple" nested loop in a previous question I've asked. However, now ... I vectorize that type of 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 - How do I efficiently extract image patches at specified locations?

I need to extract image patches of size s x s x 3 around specified 2D locations from an image (3 channels). ... I can't specify the locations. See Question&Answers more detail:os...

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

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866 views

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matlab - Save pandas DataFrame using h5py for interoperabilty with other hdf5 readers

Here is a sample data frame: import pandas as pd NaN = float('nan') ID = [1, 2, 3, 4, 5, 6, ... easily load it back using another hdf5 reader? See Question&Answers more detail:os...

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

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713 views

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matlab - How do I find values close to a given value?

I have data = [1 1.2 1.3 1.5 1.8] I want to find closest values before and after from data for this point, b = 1.23 How do I do this? See Question&Answers more detail:os...

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

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555 views

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matlab - Stopwatch function in R

Is there an R timer or stopwatch function similar to MATLAB's tic/toc? 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 - behavior of colon operator (:) with matrix or vector arguments

We all know the matlab colon operator to create a linear sequence, i.e. 1:5 = [1 2 3 4 5] ... : corrected the statement of left associativity. 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 - Applying a function on array that returns outputs with different size in a vectorized manner

How to apply a function that returns non scalar output to arrays using arrayfun? For example - How to vectorize the ... (x)(1:x),array); 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 - How do I go from 1.4795e+004 to 14795.00?

I have this problem that has been bothering me for quite a while.. I want to change the format of the number.. ... you can help me please do.. 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 - how to check whether the image is compressed or not after applying SVD on that image(regarding size of compressed image on disk)

I=imread('cameraman.tif'); figure(1),imshow(I) I1=im2double(I); [U,S,V]=svd(I1); figure(2), ... iterations is greater than the original image. See Question&Answers more detail:os...

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

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572 views

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matlab - globals and parfor

Inside a parfor loop, I am trying to call a function that accesses a global to no avail. The function function a ... . What am I doing wrong? See Question&Answers more detail:os...

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

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513 views

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matlab - Creating a cylinder with axis centered differently

I know Matlab has a function called cylinder to create the points for a cylinder when number of points along ... cylinder? Thanks in advance. See Question&Answers more detail:os...

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

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550 views

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matlab - Is it possible to prevent an uitable popup menu from popping up? Or: How to get a callback by clicking a cell, returning the row & column index?

For an user interface I'm programming an uitable. The user chooses an option A,B or C in the first column and ... table and not just one row. 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 - How do axis-angle rotation vectors work and how do they compare to rotation matrices?

I'm having a bit of trouble understanding how axis-angle rotation vectors are used when rotating a vector ... the transposed rotation 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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583 views

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matlab - How can I divide/split up a matrix by rows between two other matrices?

I have a matrix and a vector each with 3000 rows: fe = [-0.1850 -0.4485; ... -0.2150 2.6302; . ... How can I implement each of these solutions? See Question&Answers more detail:os...

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

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738 views

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matlab - split long 2D matrix into the third dimension

Say I have the following matrix: A = randi(10, [6 3]) 7 10 3 5 5 7 10 5 1 6 5 10 4 9 1 4 10 1 And ... :i+step-1, :); counter = counter + 1; end See Question&Answers more detail:os...

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

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870 views

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matlab - Is there an accumarray() that takes matrix as `val`?

accumarray()'s val argument must be a vector. In my case I need columns of a matrix to be summed (or averaged). Is ... (labels', X(:,iCol)); end See Question&Answers more detail:os...

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

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643 views

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matlab - Verify the convolution theorem

My main goal is to show that the convolution theorem works (just a reminder: the convolution theorem means that ... the casting or the padding? See Question&Answers more detail:os...

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

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