Chunru

Last seen: 2 dagen ago | Active since 2013

Matlab user since 1990

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How to make size of legend window on a figure window as small as we desire?????
openfig("fitness2snAll.fig"); figure openfig("fitness2snAll.fig"); h = legend % Try to adjust the position of the legend % ...

1 dag ago | 0

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change tick values heat map
It seems that "heatmap" has no properties for changing display text. You can use imagesc instead: data = rand(4); imagesc(dat...

2 dagen ago | 1

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Answered
How to replace cell in a table with number?
T = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1050910/Auto_20220630100635.csv'); head(T) T.PF_...

3 dagen ago | 1

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Fitting 65k rows with 6 points takes too much time with for loop.
n = 65536; M_1 = randn(1, 6); M_2 = randn(n, 6); tic coefficients=zeros (n,2); for i=1:n coefficients(i,:) = polyfit...

3 dagen ago | 1

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How to make Network/nodal analysis and value distribution in MATLAB?
"graph" can be used for such problem. Node connections are: Node 1 - 2,3,8; Node 2 - 1,4,8 ; Node 3 - 1,5,8 ; Node 4 - ...

3 dagen ago | 1

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change tick values heat map
cdata = rand(3,3); h = heatmap(cdata); h.XData = ["A", "B", "C"]; h.YData = ["A_1", "B_1", "C_1"];

3 dagen ago | 1

Answered
How to create table?
problem =["A", "A","A","A","B","B","B","B","C","C","C","C"]'; performance = ["D","E","F","G","D","E","F","G","D","E","F","G"]';...

3 dagen ago | 0

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why 350*0.001 - 0.350 and 351*0.001 - 0.351 are different from zero
The floating-point numbers are represented by a sequence of binary bits in computer. For matlab, the default double type use 64...

4 dagen ago | 0

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Divide the new images
x = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1048515/image.jpeg'); figure; imshow(x) % divide...

5 dagen ago | 0

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Working on subsection of EMG data
The simplest way (but can be cumbersome) is to plot the data and manually mark the starting and ending point of each section of ...

5 dagen ago | 0

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How to extract the right struct from the cell array of structs based on condition?
load part.mat whos % MATLAB-ish way idx = cellfun(@(x) isfield(x, 'property') && x.property == "Mass %", values); searchedIt...

5 dagen ago | 0

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Answered
How can I solve matrix selection extraction
load C.mat % select columns 1-101, columns 103-203, 205-305, and columns 307-407 % and make them into one matrix. WhatYo...

5 dagen ago | 0

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.csv file row and line
% For earlier version of matlab fid = fopen("test.csv") If possible, use '.' as decimal point rather than ','. % 4,15414 8,...

5 dagen ago | 0

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how to make a patch on geoplot?
You data is not in correct order. The axis scale is also not proportional. Try geoplot if you have mapping toolbox. x = [126...

5 dagen ago | 0

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Estimating the direction of arrival of a sound signal using time delay sum beamforming
See the comments inside the code array = phased.ULA('NumElements',11,'ElementSpacing',0.04); sensorpos = getElementPosition(ar...

5 dagen ago | 0

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Answered
Calculate a value from a table column based on defined intervals give by another table
load("table T"); load("table T2"); head(T) head(T2) n = size(T2, 1); T2_max = zeros(n, 1); for i=1:size(T2, 1) T2_max...

5 dagen ago | 0

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Answered
How can the edges on the shortestpath be determined?
s = [1 1 2 3 3 4 4 6 6 7 8 7 5]; t = [2 3 4 4 5 5 6 1 8 1 3 2 8]; G = digraph(s,t); plt = plot(G) [P, d, edgepath] = short...

5 dagen ago | 3

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Answered
One hop nearest neighbor in a graph
% Example graph s = [1 1 1 1 1 2 2 2 3 3 3 3 3]; t = [2 4 5 6 7 3 8 9 10 11 12 13 14]; weights = randi([1 10],1,13); G = gra...

6 dagen ago | 1

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Convert a function into a matrix
Parameters= {'R0','R1','C1','Qr','bo','b1','SOC','Vrc','Voc'}; R0=0.000605797; Qr=147964.8608; R1=0.000856205; C1=0.04982323...

9 dagen ago | 0

Answered
Sorting/Grouping based on date for all years
x = readtable("Example.xlsx"); % head(x) x1 = x(x.Var1>=datetime(2004, 09, 27) & x.Var1<=datetime(2004, 10, 27), :); summar...

9 dagen ago | 1

Answered
How to create a 3D surface plot from scatter3?
test=load('test.txt'); x = test(:,1); y = test(:,2); z = test(:,3); s=scatter3(x,y,z); view(3); figure dt = delaunayTri...

9 dagen ago | 0

Answered
How do I change axis label orientation
[X, Y] = meshgrid(1:.2:10, 1:.2:20); Z = sin(X) + cos(Y); figure surf(X, Y, Z) xlabel('XLabel'); ylabel('YLabel'); zlabel(...

9 dagen ago | 0

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how to remove values below 0.1?
a = 0.4*rand(100,1); % generate some data a(a<0.1) = nan

10 dagen ago | 0

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predicting crossproduct and magnitude of a vector
Multiple-layer feedforward network is a universal approximater (with some nonlinear transfer functions). So you can predict the...

10 dagen ago | 1

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table select rows with string/value of two colums
data ={ 704306.281000000 5364346.78000000 440.678000000000 113 'R' 'AX_UnlandVegetationsloseFlaeche' 0 0 0 0 0 0 70...

10 dagen ago | 0

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Hello, I did a for loop but my friend told me it is not the correct matlab syntax. Can anyone help me the for loop is in the description below:
It looks like you want to find the local minima xa = randn(30, 1); Lm = nan(size(xa)); for i=2:length(xa)-1 if xa(i-1)>x...

16 dagen ago | 0

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Storing matrices in cells
for i=1:20 %psudoinverse pH_matrix=pinv(H_matrix); % H_matrix: 1X20 % You can use cell array to store the result ...

16 dagen ago | 0

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change the hyphen (-) into minus sign (−, “U+2212”)
set(groot,'defaultAxesTickLabelInterpreter','latex'); plot(randi([-60 60], [20, 1])) xticks(-60:20:60) yticklabels(strrep(yt...

16 dagen ago | 0

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Answered
Sign minus, not hyphen
c1 = '−'; % (UTF-16: 2212), not -. c2 = '-'; s1 = "both − and -" s2 = strrep(s1, c1, c2) contains(s1, c1) contains(s2, c1...

18 dagen ago | 0

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点乘问题：矩阵和向量点乘，矩阵每一行都和向量点乘。
A=[1,2,3; 4,5,6; 7,8,9] B=[1,2,3] C= [1,4,6;4,10,18;7,16,27] % Use array (not matrix) multiplication (with auto dimension ex...

18 dagen ago | 0

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