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**Content Feed**

How to convert negative numbers in parentheses (bank-formatted text) to numbers with minus sign?

xbank = [" (1,234)" "2,345,678" "(1,234.56)"] x = arrayfun(@bank2double, xbank) function x = bank2double(s) s...

4 dagen ago | 0

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Combine mat files into one, then combine all variables into one

filename = ["abc001.mat" "def002.mat"]; % list of the files in order variable1all = []; variable2all = []; for i=1:leng...

7 dagen ago | 0

there is nan in a column, delete the whole row

idx = isnan(c.lagpe); % find the index of nan c(idx, :) =[]; % remove the rows from table

7 dagen ago | 0

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How can I automate a process for n times?

J = [14 0 0 0 0; 15 0 0 0 0; 16 16 16 0 0; 22 22 0 0 0; 24 24 0 0 0; 25 25 25 25 25] Lr = size(J,1); for i = 1:Lr row = J...

8 dagen ago | 1

Program code for convolution

u = [1 2 3 1]; v = [2 3]; conv(u, v) % filter(u, 1, v)

8 dagen ago | 0

plotting a surface on a cylinder top face

theta =0:0.01*pi:2*pi; r=0.8; x=r*cos(theta); y=r*sin(theta); z=zeros(size(x)); % simple patch for base p_base =patch(x,...

9 dagen ago | 0

How to remove cell data from specific column using dates as a reference?

T = readtable("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1085695/flowrate_dates.xlsx", "Sheet", 3) idx = T...

9 dagen ago | 0

combine two cell into one string

t = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1085370/SummaryResult%20-%20Copy.xlsx'); t = t(1:...

10 dagen ago | 0

| accepted

Echo+noise signal

% generate a waveform f0 =100; fs=1000; pw = 0.1; pri = 1; npulses = 10; s = cos(2*pi*f0*(0:1/fs:pw))'; % it can be ...

10 dagen ago | 1

| accepted

Transfer Quarterly dates to Monthly

% Your data dtstr = ["31/3/1992" "30/6/1992" "30/9/1992" "31/12/1992"]; x = [1.2 1.3 1.4 1.5]...

10 dagen ago | 0

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What is the training accuracy of this model?

If Labels is character array instead of string array, then numel(Labels) will give the number of characters instead of the numbe...

11 dagen ago | 0

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Get coordinates points inside a 3-D circle in MATLAB

normal=[-3.5556 -0.2222 1.0000]; center=[138 146 219]; radius=3; plotCircle3D(center,normal,radius); hold on point = p...

11 dagen ago | 0

How can I label multiple routes on a geoscatter plot?

fig = figure; %pos = fig.Position; %files = dir('cast*.gpx'); for i = 1:5 %length(files) %filename = files(i).name; ...

13 dagen ago | 0

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operation on single elements in MATLAB

x=-2:1:2; %coordinates x y=x.^2; %coordinates y z=[x;y] d = diff(z, 1, 2) % diff along 2nd dim d = vecnorm(d...

14 dagen ago | 1

specifying frequencies in pwelch not working

No problem for on-line matlab. data = randn(20000,1); %assume this is 1 row of my EEG data of interest analysisWinSize = 1000...

14 dagen ago | 0

Create duration array template

ti = duration('00:00:0.00','Format','hh:mm:ss.SSS'); tf = duration('02:00:0.00','Format','hh:mm:ss.SSS'); interval = millise...

14 dagen ago | 0

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Multiply values in array by *-1

a = randn(1, 106); a(14:20) a(16:18)=-a(16:18); a(14:20)

14 dagen ago | 0

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How to find sum of previous 5 numbers in a column..

x = [56 45 56 678 678 568 2 3 4 5]; y = filter(ones(5,1), 1, x) y1 = y(5:end)

14 dagen ago | 0

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Graph function problem Incorrect values

What's wrong? x=[0:50]; y=-x.^3+3*x.^2+2*x-27; plot(x,y)

14 dagen ago | 0

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How to reduce running time of diagonal matrix multiplication with full matrix in Matlab?

n = 2000; d=500; B = randn(d, n); dv = randn(n, 1); D = diag(dv); % Normal tic A = B*D*B'; toc % Speed up 1 tic C = ...

14 dagen ago | 0

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How to make a number NaN when its both neighbours are NaN?

A = [NaN 2.35 NaN 2.358 1.68 1.98 2.88 NaN 2.68 NaN 2.70 NaN 2.20 NaN 3.03; NaN NaN 2.77 NaN 2.67 1.87 2.56 1.88 2.39 NaN...

15 dagen ago | 0

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adding an if condition so the negative value would be set to zero

for i=1:length(t) DOD(i)=cumsum((T(i)*30)/(3600*14.6)); end DOD = max(DOD, 0)

15 dagen ago | 0

Circular bar graph in matlab

% Some data T.Country = string(('A':'Z')'); T.Population = randi([1000 10000], size(T.Country)); T = struct2table(T); n = he...

15 dagen ago | 1

Plot with break in curve

xy=[0.0000 -963.0477 0.0043 -961.9818 0.0085 -960.8602 0.0128 -959.6834 0.0171 -958.4515 0.0214 -957.16...

15 dagen ago | 0

removing the pixels with different size and unregular shape

A simple approach is to find the regions you want to deleted (assign 0). Four your question, rectangle regions are sufficient: ...

16 dagen ago | 1

How to plot like this graph?

% [1 2][3 4] % [6 7] h(1) = subplot(2, 4, [1 2]); % 4x2 grid, 1st subplot plot(randn(10, 1)); h(2) = subplot(2, 4, ...

16 dagen ago | 0

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Error using mesh Z must be a matrix, not a scalar or vector. Error in untitled6 (line 5) mesh(W,Y,Z)

w = 200:50:450; y=120:30:240; [W,Y] = meshgrid(w,y); Z= 64.0189+1.4629*W-2.626*Y-0.0012*W.^2+0.0098*W.*Y+0.0082*Y.^2; whos ...

16 dagen ago | 0

How to read .XY file?

file='random_x.txt'; fid = fopen(file, 'rt'); i=1; s1 = ''; while ~feof(fid) s{i} = [s1 fgetl(fid)]; %...

16 dagen ago | 0

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regexp function - get index of string with two conditions

str = {'strawberry/banana#(';'apple#,melon*cherry';'apple_banana_cherry'}; s = regexp(str, '^apple.*(cherry)$', 'match'); id...

17 dagen ago | 0

| accepted