Community Profile

photo

Sargondjani


Last seen: 3 months ago |  Active since 2012

Contact

Statistics

  • First Review
  • Knowledgeable Level 4
  • 3 Month Streak
  • Thankful Level 3
  • First Answer

View badges

Content Feed

View by

Question


Workflow Matlab with Git
I am new to Git. I mainly use Git to publish releases of Matlab packages. The packages consists of a core with some functions an...

7 months ago | 1 answer | 0

1

answer

Answered
can someone provide me alternative code for this? It shows U and v must be of same size. I am new to Matlab
I think quiver and quiver3 only work with numerical data. So you to get numercial values for P, Q, R. I think you can use the fu...

7 months ago | 0

Answered
how to copy specific columns of a matrix to a table
It is not clear what format EDPT has. And also the variable tt3 will be assigned a different value during each loop. If you want...

7 months ago | 0

Answered
Change or update an existing variable at iteration intervals in an iteration loop
it==[10 15 25 40] gives a vector as output. You want a scalar either 0 or 1: Use: ismember(it,[10 15 25 40])

8 months ago | 1

| accepted

Answered
Need help with my code
You need to use a equation solver. I assume it is a non-linear problem, so then use fminsearch or fsolve (or lsqnonlin if you wa...

8 months ago | 0

| accepted

Answered
Cycle counter with reset
you can use the function mod. For example: if mod(n,5) == 0 or variants thereof.

8 months ago | 0

| accepted

Answered
Add x=y line to the scatter plot
x = linspace(300,600,2); y = x; plot(x,y) And you will need a hold command after the scatter command.

9 months ago | 0

Answered
Find the difference between two numbers in an array and create a new array
d_theta=diff(theta);

9 months ago | 0

| accepted

Answered
Discretise a domain into a grid of uniform volume size
Why is linspace not helpful? x1 = linspace(0,1,M); x2 = linspace(0,1,M); [X1,X2] = ndgrid(x1,x2);

9 months ago | 0

Question


Scientific description of cubic spline (interpolation)
Dear all, I am writing a scientific article (quantitative economics), and I need to describe the 'spline' method (cubic spline ...

9 months ago | 0 answers | 1

0

answers

Answered
how can i save the even index to a matrix 2:5 using for loop
I think you want something like this: (which you could speed up by pre-allocating MAT=NaN(2,5)) cnt_rows = 0; cnt_cols = 0;...

9 months ago | 1

Question


mldivide versus least squares: X\(eye(m)) versus ( (X'X)\eye(m))*X'
Dear all, I am fitting a polynomial to data. I construct a polynomial basis X. I use some algorithm to update Y. I could use t...

9 months ago | 1 answer | 0

1

answer

Answered
Please help me convert equation to matlab code
[0 0 0;1 2 3] is an example of a matrix i Matlab. Please try the rest yourself. We are not here to do your homework. If you gav...

10 months ago | 0

Answered
Error in fmincon (line 568) initVals.f = feval(funfcn{3},X,varargin{:})
As the error says there is no function P_model_main. You also only provided coded with a function called P_model. And please don...

10 months ago | 2

Answered
Changing color of plot
The problem is that you plot only 1 point at a time. So there is no line to plot, just a point. That's why your code doesn't wor...

10 months ago | 0

Answered
How to evaluate parameters in sum() of handle functions with fminsearch
Take a look at this. I hope it helps. x_exp=rand(1,10); %just to define the known vectors y_exp=rand(1,10); n=3; g=rand(1,n)...

10 months ago | 1

| accepted

Answered
Plot the slope of a parabola with only the data points being known
clc; clear all; close all; x = linspace(-0.5,0.5,25); %length in (meters) def_3mm_no_grav = -[0.00 5.82e-1 1.08 1.53 1.94 ...

10 months ago | 0

Answered
How do I plot if I have a lot of data on the x-axis and I want to see the whole line properly in app designer?
It is not clear what you mean with "How can I see all the lines correctly?" I'm sure the lines are correct, but your input is n...

11 months ago | 0

Answered
I can't figure out how to define X in a piecewise function to create a Bending Moment Diagram
The script of your professor is actually the function. Save it and you can call the function. function handle: myfun = @(x)mom...

11 months ago | 1

Answered
fsolve, fmincon producing different results
I believe fmincon could also be stuck in a local minimum, due to the quadratic terms. This solution might not actually solve the...

11 months ago | 0

Answered
how to retrieve a table from a cell array?
NEver used table but i think this will work: X = results{1,2}{1,1}; MyDates = X.Date; Might even work directly: MyDates = ...

11 months ago | 0

Answered
Issue with numerical integration of two variable function
You created only function handles. So f(x,y) = ..... To compute the numerical value you need to assign numerical values to x an...

11 months ago | 0

Answered
Index in position 2 exceeds array bounds (must not exceed 2). Error in fun1 (line 5)
You calculate: for i=1:N for j=1:D pos(i,j)=lb(j)+rand*(ub(j)-lb(j)); end end with D= 2, so pos is a...

11 months ago | 0

Answered
How to Solve matrix equations in Matlab
Your method seems valid. But of course fsolve will only attempt to find a local solution, and it might get stuck in a place wher...

11 months ago | 1

Answered
Index exceeds the number of array elements
The argument in brackets should be an index number, so for example: x = 1:10; %a 1 x 10 vector for ix = 1:size(x,2); f(ix) = ...

11 months ago | 0

| accepted

Answered
How to put fsolve in a loop, using 2 unknowns?
Replace the first line with: H = @(X)fsolve_root_finding(X(1),X(2));

1 year ago | 0

Answered
Need to apply trapezoidal rule for double integration with an array by using the for loop
There are two things that need correction: 1) Remove the line i=i+1. This is what the for loop does. (also don't use "i" in ge...

1 year ago | 0

Answered
Error in find Precision recall curve
Try without the quotations: [XCrit,tpr,YCrit,ppv] = perfcurve(Y,diffscore1,'HandGrip'); In general quotations are used to sp...

1 year ago | 0

| accepted

Answered
I am solving a nonlinear Model predictive control problem . I get the following error. Can anybody help me understand the error report?
The error says that the derivative at the initial point (x0) is either NaN, infinity, or complex. So you should check whether th...

1 year ago | 0

| accepted

Answered
time series interpolation of irregular data
You can use "griddedInterpolant". I would use 'pchip' as method.

1 year ago | 0

Load more