Mathematical computing

Answered

Box plot labels not working for hold on

Tab = readtable("Validation.txt"); TABLE=table2array(Tab); Data=TABLE(:,:); X1= [1 2 3]; X2=[4 5 6]; X3=[7 8 9]; hold ...

Box plot labels not working for hold on

Tab = readtable("Validation.txt"); TABLE=table2array(Tab); Data=TABLE(:,:); X1= [1 2 3]; X2=[4 5 6]; X3=[7 8 9]; hold ...

2 months ago | 0

Answered

How to extract data from MATLAB code?

%if true A = rand(389,40) iwant = A(105:381,:)

How to extract data from MATLAB code?

%if true A = rand(389,40) iwant = A(105:381,:)

2 months ago | 1

Answered

Fourier series sawtooth wave

T=input('what is the period'); p=input('how many coefficients'); t=linspace(0,3*T,100); N=10; bp=sin(90)/90 - cos(0); ap...

Fourier series sawtooth wave

T=input('what is the period'); p=input('how many coefficients'); t=linspace(0,3*T,100); N=10; bp=sin(90)/90 - cos(0); ap...

2 months ago | 0

Answered

How to correctly use MONTHS function?

Type which months at the command window If you see more than two functions with filenames months then it may be due to cust...

How to correctly use MONTHS function?

Type which months at the command window If you see more than two functions with filenames months then it may be due to cust...

2 months ago | 0

Answered

How to plot months on x-axis with different length of values on y-axis?

%if true M = {'January' 'February' 'March' 'April' 'May' 'June' 'July' 'August' 'September' 'October' 'November' 'Decembe...

How to plot months on x-axis with different length of values on y-axis?

%if true M = {'January' 'February' 'March' 'April' 'May' 'June' 'July' 'August' 'September' 'October' 'November' 'Decembe...

2 months ago | 0

Answered

average over a certain range of index ?

clear clc A = [1 7 12 20 23 31]; B = [6 11 19 22 30 35]; C = rand(1,35) for i = 1:numel(A) kk(i) = mean(C(A(i):B(i)));...

average over a certain range of index ?

clear clc A = [1 7 12 20 23 31]; B = [6 11 19 22 30 35]; C = rand(1,35) for i = 1:numel(A) kk(i) = mean(C(A(i):B(i)));...

2 months ago | 1

Answered

Negative range in range-doppler plot for FMCW radar

%if true [X Y] = meshgrid(-10:10,0:30) Use the range in _meshgrid_ while generating contour plot like above. Changing axis...

Negative range in range-doppler plot for FMCW radar

%if true [X Y] = meshgrid(-10:10,0:30) Use the range in _meshgrid_ while generating contour plot like above. Changing axis...

2 months ago | 0

Answered

Plotting in Matlab appdesigner

%if true function GenerateButtonPushed(app,eventData) It's eventdata instead of event

Plotting in Matlab appdesigner

%if true function GenerateButtonPushed(app,eventData) It's eventdata instead of event

2 months ago | 0

Answered

Trying to take mean of group of values and exclude one value, receiving error: Index exceeds the number of array elements (0)

%if true q01=xlsread('Lab2Data.xlsx', 'B6:B41'); Can you Check if the Lab2Data.xlsx has any empty cells between B6:B41?...

Trying to take mean of group of values and exclude one value, receiving error: Index exceeds the number of array elements (0)

%if true q01=xlsread('Lab2Data.xlsx', 'B6:B41'); Can you Check if the Lab2Data.xlsx has any empty cells between B6:B41?...

2 months ago | 0

Answered

Global legend for all subplots in a figure placed ON the figure (not outside the figure)?

figure ax1 = subplot(2,1,1); ...% your code .... xlabel('Time [min]','Interpreter','latex') ylabel('Surface temperature [...

Global legend for all subplots in a figure placed ON the figure (not outside the figure)?

figure ax1 = subplot(2,1,1); ...% your code .... xlabel('Time [min]','Interpreter','latex') ylabel('Surface temperature [...

2 months ago | 0

Answered

Fitting data into a required function

%if true m = 2 n = 1.5 Y = m*x.^n; k = polyval(x,Y) First use _polyval_ for the equation and then apply pol...

Fitting data into a required function

%if true m = 2 n = 1.5 Y = m*x.^n; k = polyval(x,Y) First use _polyval_ for the equation and then apply pol...

2 months ago | 0

Answered

how to make both graphs x and y axis identical?

subplot(211) t = linspace(0,3,1200) stem(1:100:1200,3*cos(t(1:100:1200))) xlim([1 1200]) xticks([0 200 400 600 800 1000 1200...

how to make both graphs x and y axis identical?

subplot(211) t = linspace(0,3,1200) stem(1:100:1200,3*cos(t(1:100:1200))) xlim([1 1200]) xticks([0 200 400 600 800 1000 1200...

2 months ago | 0

Answered

Storing the value of an Array from a For loop with an If statement

tss(i)=t; %records time enter steady state. Use the index to record the time entered

Storing the value of an Array from a For loop with an If statement

tss(i)=t; %records time enter steady state. Use the index to record the time entered

2 months ago | 0

Answered

Unable to store matrix array in for loop

t = linspace(10^-4,10^12,17) for i = 1:17 m{i} = inv((At * Cd * A) + (t(i) * Ht * H)) * At * Cd * do ; % use cell array ...

Unable to store matrix array in for loop

t = linspace(10^-4,10^12,17) for i = 1:17 m{i} = inv((At * Cd * A) + (t(i) * Ht * H)) * At * Cd * do ; % use cell array ...

2 months ago | 0

Answered

dsolve code is not running

M2 M3 a1 k K L A Rd Br Pr Nb Nt G Le H Assign values for above variables instead of symbolic variables, As you are using on...

dsolve code is not running

M2 M3 a1 k K L A Rd Br Pr Nb Nt G Le H Assign values for above variables instead of symbolic variables, As you are using on...

2 months ago | 0

Answered

plot zero input response

%if true syms y n=0:99; a_1=3; a_2=4; x=(-1/5*y+4/5*y)*(-1).^n+(16/5*y+16/5*y)*(4).^n; fplot(x,[-2,-1]) Use fplot...

plot zero input response

%if true syms y n=0:99; a_1=3; a_2=4; x=(-1/5*y+4/5*y)*(-1).^n+(16/5*y+16/5*y)*(4).^n; fplot(x,[-2,-1]) Use fplot...

2 months ago | 1

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Answered

Index Exceeds Matrix Dimensions error in For Loop

%if true L = 10; F1 = zeros(1,L) F2 = zeros(1,L) F3 = zeros(1,L) T1(1)=200; T2 = zeros(1,L); T3 = zeros(1,L); T3(3)=40...

Index Exceeds Matrix Dimensions error in For Loop

%if true L = 10; F1 = zeros(1,L) F2 = zeros(1,L) F3 = zeros(1,L) T1(1)=200; T2 = zeros(1,L); T3 = zeros(1,L); T3(3)=40...

2 months ago | 1

Answered

plotting line parallel to the x-axis instead of the y-axis

%if plot([wl-0.01,0],intt,'b',wl,intt,'b',[wl+0.01,0],intt,'b') Use [] for adding elements and _int_ is standard function...

plotting line parallel to the x-axis instead of the y-axis

%if plot([wl-0.01,0],intt,'b',wl,intt,'b',[wl+0.01,0],intt,'b') Use [] for adding elements and _int_ is standard function...

2 months ago | 0

Answered

If statement in for loop does not work

%if true x = 0.5; for i=1:6 x = (x)+0.1 if strcmp(num2str(x),'1') disp('yes') end end Try the above

If statement in for loop does not work

%if true x = 0.5; for i=1:6 x = (x)+0.1 if strcmp(num2str(x),'1') disp('yes') end end Try the above

2 months ago | 0

Answered

How to use eval() command to save the workspace variables in different working directory?

%% pwds - different working directory - D:\matlabfiles\ACTIVITY\Itr 3\Script eval(['save(fullfile(' pwds 'Batch_' num2str(i) '_...

How to use eval() command to save the workspace variables in different working directory?

%% pwds - different working directory - D:\matlabfiles\ACTIVITY\Itr 3\Script eval(['save(fullfile(' pwds 'Batch_' num2str(i) '_...

2 months ago | 0

Answered

Why is the following numerical integration not working?

TMD = integral2(area,0,2,0,2*pi); Alternate way

Why is the following numerical integration not working?

TMD = integral2(area,0,2,0,2*pi); Alternate way

2 months ago | 0

Solved

Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

2 months ago

Answered

Stress-strain graph

To delete 1st column AluminumW(1:75,1) = []; % to delete 1st column

Stress-strain graph

To delete 1st column AluminumW(1:75,1) = []; % to delete 1st column

2 months ago | 0

Answered

How to convert a matrix into a vector that has each row as an array?

C = {{[a b c d]} {[ e f g h]} {[ i j k l]}}

How to convert a matrix into a vector that has each row as an array?

C = {{[a b c d]} {[ e f g h]} {[ i j k l]}}

2 months ago | 0

Answered

Slope equation for plot of best fit line

Use the function diff and see if the difference values are constants or varying https://in.mathworks.com/help/matlab/ref/diff....

Slope equation for plot of best fit line

Use the function diff and see if the difference values are constants or varying https://in.mathworks.com/help/matlab/ref/diff....

2 months ago | 0