Answered

plot a table of two columns

If T is your table. To plot use: plot(T.(1),T.(2))

plot a table of two columns

If T is your table. To plot use: plot(T.(1),T.(2))

5 dagen ago | 1

| accepted

Answered

Write function that returns true if (inputmatrix > 0)

A = rand(5) ; P = A > 0.5

Write function that returns true if (inputmatrix > 0)

A = rand(5) ; P = A > 0.5

5 dagen ago | 0

Answered

Why isn't the plot showing up? (new on programing)

x = linspace(-10,10,100); y = @(x) (x.^2 + x.^2 + 3.*x)./(x.^2 + 4.*x + 5); % element by elememnt division plot(x,y(x),'r','L...

Why isn't the plot showing up? (new on programing)

x = linspace(-10,10,100); y = @(x) (x.^2 + x.^2 + 3.*x)./(x.^2 + 4.*x + 5); % element by elememnt division plot(x,y(x),'r','L...

5 dagen ago | 0

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Answered

How to get the centerline of a binary region

You can get the indices of white pixels using find and to the data you can try fitting a line or quadratic equation using polyfi...

How to get the centerline of a binary region

You can get the indices of white pixels using find and to the data you can try fitting a line or quadratic equation using polyfi...

6 dagen ago | 3

Answered

Transforming 4 sets of 1x4 matrix into a 4x4 matrix

zetaliq=zeros(4); for j=1:4 zetaliq(j,:)=(pi/6).*rholiq.*(X1.*m1.*d1^(j-1)+X2.*m2.*d2^(j-1)) ; end zetaliq

Transforming 4 sets of 1x4 matrix into a 4x4 matrix

zetaliq=zeros(4); for j=1:4 zetaliq(j,:)=(pi/6).*rholiq.*(X1.*m1.*d1^(j-1)+X2.*m2.*d2^(j-1)) ; end zetaliq

6 dagen ago | 0

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Answered

Grouping data into bins and then plotting them

You can calculate the every three hours mean using the fuction retime. Read about it. To see the variation of every hours, stria...

Grouping data into bins and then plotting them

You can calculate the every three hours mean using the fuction retime. Read about it. To see the variation of every hours, stria...

6 dagen ago | 0

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Answered

How to delete some of anonymous variables randomly?

Multiply each variable with a constant array, and assign this contant array with 0 and 1. See to it that, randomly only three 1'...

How to delete some of anonymous variables randomly?

Multiply each variable with a constant array, and assign this contant array with 0 and 1. See to it that, randomly only three 1'...

6 dagen ago | 0

Answered

Array indices must be positive integers or logical values.

%Euler Method %parameters g=9.81; rho=1.2; s=0.00011; m=0.023; Cd=0.9; %Initial Condition V0=0; V=zeros([],1); %I...

Array indices must be positive integers or logical values.

%Euler Method %parameters g=9.81; rho=1.2; s=0.00011; m=0.023; Cd=0.9; %Initial Condition V0=0; V=zeros([],1); %I...

6 dagen ago | 1

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Answered

how can I find the maximum value of a parameter running within a loop

maxC = 0 ; for i=1:100 A=f(i) ; B=f(A,i) ; C=f(B,i) ; if C > maxC maxC = C ; Amax = A ;...

how can I find the maximum value of a parameter running within a loop

maxC = 0 ; for i=1:100 A=f(i) ; B=f(A,i) ; C=f(B,i) ; if C > maxC maxC = C ; Amax = A ;...

7 dagen ago | 0

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Answered

make a matrix out of list

Read about importdata. You can import the data into MATLAB, the data will be a cell array. S = importdata('myfile.txt') ; cel...

make a matrix out of list

Read about importdata. You can import the data into MATLAB, the data will be a cell array. S = importdata('myfile.txt') ; cel...

7 dagen ago | 0

Answered

How could I write in a vector something in a position different to a given one?

v = [1,2,3,4,5]; idx = 3; iwant = NaN(size(v)) ; iwant(idx) = v(idx)

How could I write in a vector something in a position different to a given one?

v = [1,2,3,4,5]; idx = 3; iwant = NaN(size(v)) ; iwant(idx) = v(idx)

8 dagen ago | 1

Answered

How to store data when a string condition of another column is met?

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/768171/SED_FULL_NE.xlsx') ; id = [1 4 12] ; T =...

How to store data when a string condition of another column is met?

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/768171/SED_FULL_NE.xlsx') ; id = [1 4 12] ; T =...

8 dagen ago | 0

Answered

Finding coefficients from 4 degree polynomial

Read about polyfit. This will help you to fit the required degree polynomial and also gives you the coefficients. Also have a lo...

Finding coefficients from 4 degree polynomial

Read about polyfit. This will help you to fit the required degree polynomial and also gives you the coefficients. Also have a lo...

8 dagen ago | 0

Answered

black line frame around scatter3

You can draw lines using line. Read about it. Also try box on.

black line frame around scatter3

You can draw lines using line. Read about it. Also try box on.

8 dagen ago | 0

Answered

What is the difference between [v' 1] and [v', 1]?

v = rand(3,1) ; [v' 1] [v',1] That is nothing but vector v is increased by one element at the end and the value is 1.

What is the difference between [v' 1] and [v', 1]?

v = rand(3,1) ; [v' 1] [v',1] That is nothing but vector v is increased by one element at the end and the value is 1.

8 dagen ago | 0

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Answered

Split the graph based on a specific value

Let (x,y) be your data. idx = knnsearch(y,mean(y)) ; % this will give index in y which is close to mean(y) % plot plot(x(1:...

Split the graph based on a specific value

Let (x,y) be your data. idx = knnsearch(y,mean(y)) ; % this will give index in y which is close to mean(y) % plot plot(x(1:...

8 dagen ago | 0

Answered

Plot Modes of a cylinder in 3D

Have a look on this: https://in.mathworks.com/matlabcentral/fileexchange/34143-meshing-thin-shells-using-four-noded-elements?s_t...

Plot Modes of a cylinder in 3D

Have a look on this: https://in.mathworks.com/matlabcentral/fileexchange/34143-meshing-thin-shells-using-four-noded-elements?s_t...

9 dagen ago | 1

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Answered

Error using plot Data must be numeric, datetime, duration or an array convertible to double.

Variable phi used in the plot is a symbolic variable. 1/3 - (310775629405771*exp(t*4i))/576460752303423488 You cannot plot tha...

Error using plot Data must be numeric, datetime, duration or an array convertible to double.

Variable phi used in the plot is a symbolic variable. 1/3 - (310775629405771*exp(t*4i))/576460752303423488 You cannot plot tha...

9 dagen ago | 0

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Answered

vpa is not outputing enough digits

It seems a is a rational number so there are no digits to display else from zeros. Where as pi is a irrational number, so you ha...

vpa is not outputing enough digits

It seems a is a rational number so there are no digits to display else from zeros. Where as pi is a irrational number, so you ha...

9 dagen ago | 0

Answered

Draw the ezplot for the function 𝑥^ 2 + 6𝑥 + 55

It is very striaght forward and very easy to plot. Just read the documentation. It got example problem with which you can learn ...

Draw the ezplot for the function 𝑥^ 2 + 6𝑥 + 55

It is very striaght forward and very easy to plot. Just read the documentation. It got example problem with which you can learn ...

9 dagen ago | 0

Answered

How plot 4D data?

x = 0.1:0.01:0.19; y = 0.1:0.01:0.19; z = 0.1:0.01:0.19; [x,y,z] = meshgrid(x,y,z) ; f = x.*exp(x.^2 + y.^2 + z.^2); fig...

How plot 4D data?

x = 0.1:0.01:0.19; y = 0.1:0.01:0.19; z = 0.1:0.01:0.19; [x,y,z] = meshgrid(x,y,z) ; f = x.*exp(x.^2 + y.^2 + z.^2); fig...

9 dagen ago | 3

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Answered

how to rectify the below error..

You need to have the function cheb.m, which you can download from: https://people.maths.ox.ac.uk/trefethen/cheb.m and then yo...

how to rectify the below error..

You need to have the function cheb.m, which you can download from: https://people.maths.ox.ac.uk/trefethen/cheb.m and then yo...

10 dagen ago | 0

Answered

Move to next and previous iteration in for loop on button press

%Right for i = 1:10 fprintf('%d\n',i) end % Left for i = 10:-1:1 fprintf('%d\n',i) end

Move to next and previous iteration in for loop on button press

%Right for i = 1:10 fprintf('%d\n',i) end % Left for i = 10:-1:1 fprintf('%d\n',i) end

10 dagen ago | 0

Answered

How to plot a function with 3 independent variables

f = @(x,y,z) 0.95*x+0.73*y+0.62*z-130.05 ; x = linspace(0,100) ; y = linspace(0,100) ; z = linspace(0,100) ; [X,Y,Z] = me...

How to plot a function with 3 independent variables

f = @(x,y,z) 0.95*x+0.73*y+0.62*z-130.05 ; x = linspace(0,100) ; y = linspace(0,100) ; z = linspace(0,100) ; [X,Y,Z] = me...

10 dagen ago | 0

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Answered

NaT in Datetime Import Data

Try using readtable. Read about it. T = readtable('myfile.xlsx') ;

NaT in Datetime Import Data

Try using readtable. Read about it. T = readtable('myfile.xlsx') ;

10 dagen ago | 0

Answered

How do I copy column datas from multiple .txt file to new file?

You can read your text file using the below code snippet. filename = 'ab20140102.txt' ; fid = fopen(filename,'r'); data = tex...

How do I copy column datas from multiple .txt file to new file?

You can read your text file using the below code snippet. filename = 'ab20140102.txt' ; fid = fopen(filename,'r'); data = tex...

10 dagen ago | 1

| accepted

Answered

Why is my plot not working in my for loop?

This line: theta2=linspace(0,2*pi,2*pi/360); gives you theta2 as an empty matrix, as you have used this for loop indexing, you...

Why is my plot not working in my for loop?

This line: theta2=linspace(0,2*pi,2*pi/360); gives you theta2 as an empty matrix, as you have used this for loop indexing, you...

10 dagen ago | 0

Answered

how to get Zm

syms Km Zm Ym [2 2] syms Z R S L Z=R+S*L ; Km=[1 Z; 0 1] ; Zm = sym('Zm',[2 2]) ; % Relation between Km and Zm Zm(1,1)=(K...

how to get Zm

syms Km Zm Ym [2 2] syms Z R S L Z=R+S*L ; Km=[1 Z; 0 1] ; Zm = sym('Zm',[2 2]) ; % Relation between Km and Zm Zm(1,1)=(K...

11 dagen ago | 0

Answered

How to access a variable stored in group

file1 = 'tropomi1.nc' ; file2 = 'tropomi2.nc' ; x1 = ncread(file1,'/PRODUCT/longitude'); y1 = ncread(file1,'/PRODUCT/latitude...

How to access a variable stored in group

file1 = 'tropomi1.nc' ; file2 = 'tropomi2.nc' ; x1 = ncread(file1,'/PRODUCT/longitude'); y1 = ncread(file1,'/PRODUCT/latitude...

11 dagen ago | 1