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Feeds
Matlab If Else Statement
Hi @Joseph DeMaria You have saved the script file with name myfunx but it also contains a function myfun(x) which takes input a...
4 días hace | 0
calculating fourier series for the given functions and drawing the curve?
clear syms x N=[5 15 30]; f1=exp(-abs(x)); a_01=(1/pi)*int(f1.*cos(0*x),x,-pi,pi); f_new10=vpa(a_01/2) f2=exp(-(x)); a_...
21 días hace | 0
error in fourie script
g=@(x) 1.*(x>0)+(-1).*(x<0); a_0=(1/pi)*quad(g,-pi,pi) x = linspace(-pi,pi,200); for k = 1:numel(x) for n=1:10 ...
21 días hace | 0
I am trying to code a solution to blasius eq using Runge kutta 4, help please.
@Guillermo, The anonymous functions, F ,G, H defined for the blasius flow need to applied in the same manner when RK4 method is...
29 días hace | 0
How can I scale and plot the graph according to the formula I use?
@Zaref Li you need to take the differential for noise term while solving the equation i.e. dW instead of W % Define paramete...
29 días hace | 0
Plotting the attenuation constant against frequency
@Vinci Use smaller conductnce value, and semilogx for ploting graph % Clear screen and variables clc, clear all % Define d...
alrededor de 1 mes hace | 0
Why are the results of the iterative calculations different?
%%%%%%%%%%%%%%% clear clc T=1e-3; t=0:T:1; u=sin(2*pi*50*t); hold on for k = 1: numel(u) y(k)=fcn(u(k)); end plo...
alrededor de 1 mes hace | 0
| aceptada
How to plot level curves
@Irene Zhou there is a missing element wise product operator for the equation in your code. [X,Y] = meshgrid(linspace(700,900,...
alrededor de 1 mes hace | 0
readtable struggling to interpret spreadsheet as numbers
seriesAL = rows2vars(readtable('Alberta.csv', ReadRowNames=1, MissingRule="omitrow",VariableNamingRule='preserve')) yy = strrep...
2 meses hace | 0
Hi, I am having some trouble with a plot. I am trying to plot pressure vs. time using an equation for pressure with respect to time. Whenever I plot this I get a blank graph, so i'm not sure what the problem is. I appreciate any help!
@Sarah Fries Try using the vpasolve function and solve the equation for well defined input time interval. In your code, you we...
2 meses hace | 1
I didn't understand it how they completed it?
@Mohit Define the symbolic variables d & theta for the given equation to be solved % syms d theta x = [d theta]; % defin...
2 meses hace | 0
Workspace variable not available despite visibility in another variable
if you want to store the variable names Testsignal_1 and Current then you need to use an indexing variable as below. If this c...
2 meses hace | 0
| aceptada
Adding Legend to Subplot
@Ollie Bardsley, you need to rearrange the few lines of code inside the for loop as shown below LF = ["0 1.fig","0 2.fig","1...
3 meses hace | 0
| aceptada
Resuelto
Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).
3 meses hace
Resuelto
Reverse Run-Length Encoder
Given a "counting sequence" vector x, construct the original sequence y. A counting sequence is formed by "counting" the entrie...
3 meses hace
How can I write a 'for' loop that sums up all elements of a vector?
@Seif do you mean like this ? a= [1:5] for i=1:3 c(i)=sum(a(i)+a(i+1)) disp(sum(c)) end
3 meses hace | 0
| aceptada
Legend colors change when I have two y axes
colors=["#028A0F","#1D57A9","#3DCBC8","#9C58A1","#F0D04D","#CD0027","#EF9F26","#B2B3B5","#FA9DAC","#98FF98","#67032F","#010101"]...
3 meses hace | 0
| aceptada
How to make the negative sign of y axis to be up ?
ydata = -900:100:100 xdata = ydata.*ones(1,length(ydata)) plot(xdata,ydata) yticks = ydata; yticklabels(fliplr(yticks))
3 meses hace | 0
Resuelto
Acidity of vinegar and salts
Assuming: pH (potentia hydrogenii) = - log10(H+ ionic concentration in mol/Liter). For a buffer solution containing acetic acid ...
4 meses hace
Resuelto
Volume of this donut
Given hole diameter a, and outermost diameter b, determine the volume y of the resulting donut.
4 meses hace
Resuelto
Size of this cup?
The given vector has diameter of the cup in mm sampled at micrometer increments in depth from top to bottom, need output in cc a...
4 meses hace
Resuelto
Finding perimeter of a rectangle
A rectangle has a length of x centimeters and a width of w centimeters. Find the perimeter.
4 meses hace
Resuelto
area of an annulus
Given the diameter d of the inner circle of the annulus. Given length z of a chord of the outer circle of the annulus. This chor...
4 meses hace
Resuelto
expand intervals vol.2
Similar to problem <http://www.mathworks.co.uk/matlabcentral/cody/problems/2528 2528>. This is a more general case, when bounds ...
4 meses hace
Resuelto
Time Expansion
How can you slow down any discrete-time signal? Example Input original signal x. x = [1 2 3 -1 -2 -5 -4] We want t...
4 meses hace
Incorrect dimensions for matrix multiplication
k = @(t,u) (k0 + (p*k0.^u-q*k0).*t +(p*k0.^u-q*k0).*(p*u*k0.^u-q).*t.^2/factorial(2)... +(p*k0.^u-q*k0).*((p*u.*k0.^u-q)....
4 meses hace | 0
| aceptada
how to get variable of function in for loop
x = 1:20; y = 1:13; f = []; for i = 1:length(x), for j = 1:length(y); f(i,j) = x(i).^2 - x(i) -2*y(j).^2 + y(j) -2...
4 meses hace | 0
Resuelto
Convert Kilometers to Miles
Convert kilometers to miles. Consider 1 km = 0.62 mile. Note: Don't use the '*' operator.
4 meses hace
Resuelto
Create an anti-identity matrix
Create an anti-identity matrix of given dimension. Examples n = 2 A = [0 1; 1 0] n = 3 A = [0 0 1; 0 1 0; 1 0 0...
4 meses hace
Resuelto
Sort the vector with the given index
Given x = [1 2 4 8 17] and t = [1 3 2 5 4] then y = [1 4 2 17 8].
4 meses hace