# Chunru

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Matlab user since 1990

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**Feeds**

How to remove (or isolate) side peaks except main peak after FFT

You can try "findpeaks" and using "MinPeakDistance" option. doc findpeaks

ongeveer 8 uur ago | 0

plot signal - adjust axis

% Test data f = (-100:1:100); p = randn(size(f)); p = p-min(p)+1; % extropolate data fe = [-125 f 125]; pe = interp1(fe...

2 dagen ago | 0

How to set the font in pdf generated by LiveScript

One workaround is to change the paper size, orientation and margin when exporting to pdf file. Export-->Show more--> Change Pap...

5 dagen ago | 0

Selecting one side of xy data points

You can use inpolygon to test if the dot is in red shape or blue shape: doc inpolygon

5 dagen ago | 0

Merge multiple cells into one cell array

n = 3; Degrees = randi([0 359], [n, 1]) Minutes = randi([0 59], [n, 1]) Seconds = rand([n, 1])*60 s = compose("%d%c%d%c%...

5 dagen ago | 1

How to to get a figure to fill a box or get a box around the figure

axis tight

22 dagen ago | 0

| accepted

HELP! How can i solve this array incompatible size issue

Make the change: N = length(t); If you need larger N, thant T in your code to a larger value. % Parameters fs = 1000; ...

22 dagen ago | 1

| accepted

Vertically Concatenating Tables in a Loop

TableAll = []; for m = 1:10 Trial = [COPData(m).data,OPALData(m).data]; %Original Table COPTv_y = diff(Trial.COPy)./d...

23 dagen ago | 0

| accepted

Is there a way to identify which dataset a value belongs to for overlapping datasets?

websave("dataset.mat", "https://www.mathworks.com/matlabcentral/answers/uploaded_files/1650591/dataset.mat") load("dataset.mat"...

23 dagen ago | 0

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Choosing the role of NaN elements in the sum environment of matrices

aa=[1 2; 3 NaN]; bb=[NaN 1; 2 NaN]; cc = mean(cat(3, aa, bb), 3)

23 dagen ago | 0

Shift Filter outputs to align peaks

You can compute the group delay around the fc to align the output (approximately). fs = 20e3; numFilts = 32; % filter_numbe...

24 dagen ago | 1

How to create biphasic pulses?

N = 4; %400; % number of pulses Tp = 1; % pulse width; d1 = 1; % interphase delay d2 = 1; % in...

26 dagen ago | 0

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what does this mean , how and for what is it used ?

The following will produce a 5-dimensional array of 2x3x5x5x8. You can access the element by specifying 5-d index x=ones(2,3,4...

27 dagen ago | 0

How to generate multiple tiff files into my file path?

thresholdarray = [0.01, 0.1, 0.001]; medfiltarray = [2, 8, 10, 16]; for i = 1:3 thresholdvalue = thresholdarray(1,i); ...

28 dagen ago | 0

How to create a series of separate tiff files?

It works here (in a unix environment). You may want to change ":" in file names into "_" for windows. thresholdarray = [0.01, ...

28 dagen ago | 0

How to fine numerical gradient

clear; clc; xs = linspace(1,2,100); ys = linspace(1,3,100)'; % transpose here fun_values = zeros(100,100); %{ for ix...

28 dagen ago | 1

| accepted

Why does the fft function cut in half the amplitude of my signal?

Note that a sinosoidal signal can be expressed as: FFT of (normalized by N) will have a peak at f0 with amplitude of 1 (si...

28 dagen ago | 0

meaning of f in fprintf function

In old days, the command \f is used to make a printer to move to beginning of next pages. fprintf or print or printf are used b...

29 dagen ago | 1

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Sig figs on the rand function

==> Just another general question here, is there a reason the rand function has 6 sig figs? i.e. 12.3456 rand function (by defa...

29 dagen ago | 0

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Keep elements of an array that only fall within a given closed shape

space_a=linspace(0,168.3934962848858,50); % nm space_b=linspace(0,250,50); % nm z = peaks(50); % generate some test dat...

29 dagen ago | 1

| accepted

How to extend a curve until x-axis and y-axis?

Use "axis tight" r=0.03; T=10; t=2; lambda1=0.28:0.28:3.08; thai=0.43; alpha=7.2; delta=0.0609; s=100:100:1100; sigma=2...

ongeveer een maand ago | 1

| accepted

I keep getting an error on my correlation coefficient on line 20

There is no error running here(see below). Can you show your error message? % Given data x = [0, 2, 4, 6, 9, 11, 12, 15, 17, 1...

ongeveer een maand ago | 0

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How to up-sample both signals and labels together?

%websave("upsamp.mat", "https://www.mathworks.com/matlabcentral/answers/uploaded_files/1642771/upsamp.mat"); websave("upsamp_R....

ongeveer een maand ago | 0

| accepted

connecting each data points in a bar graph with an error bar

Saline1 = [41 55]; Saline2 = [34 26]; bar(1,mean(Saline1), 0.6, 'FaceColor',[0.7 0.7 0.7]) hold on bar(2,mean(Saline2), 0.6,...

ongeveer een maand ago | 0

Which function used to use in M-Script to remove the variables

a = 3; b = 4; % use clear to remove variables clear a whos a

ongeveer een maand ago | 0

How to put different size vectors to one matrix or mat file?

d1=[1 2 3 4 5 6 7 8]; d2=[1 2 3 4 5]; d3=[1 2 3]; d4=1; % Use cell array d5 ={d1; d2; d3; d4} % you can save d5 as a mat f...

ongeveer een maand ago | 2

How to filter out multiple outliers from a gradually changing dataset?

Adjust the threshold: websave("a_data.mat", "https://www.mathworks.com/matlabcentral/answers/uploaded_files/1641186/a_data.mat"...

ongeveer een maand ago | 0

| accepted

how to solve if interpolated data also contains NaN values

a = readmatrix("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1641181/V2_small.txt"); a(a>9999.8) = nan b...

ongeveer een maand ago | 0

| accepted

How to plot data from an external MAT file against a time domain?

If you want to plot whole time series: ns = length(icpcomposite); t = (0:ns-1)/fs; plot(t, icpcomposite); If you want to plo...

ongeveer een maand ago | 1