Pooneh Shah Malekpoor
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Accept 20 answers given by other contributors
Awarded to Pooneh Shah Malekpoor on 01 Mar 2023
Feeds
Question
fitnlm interpretation of results
Hi everyone I have fitted a regression curve to my data using weighted least square method by fitnlm. The question is : Accord...
1 year ago | 1 answer | 0
1
answerQuestion
How to do weighted least square rgression?
Hello I want to fit an exponential curve to my data using MatLab. Could you please guide me how can I write a code to fit this ...
1 year ago | 1 answer | 0
1
answerQuestion
How to import certain lines of a dat file into matlab
Hi Here is my text file in notepad. I just want to import -299.0625,57.52286903 from the third line in Sample 1, fourth line: ...
1 year ago | 1 answer | 0
1
answerQuestion
How can I make this code more efficient?
Hi This piece of code is so slow due to the big number of nx1 and nye. Could you please tell me how I can make it quicker? Tha...
1 year ago | 2 answers | 0
2
answersQuestion
how to make the trend line identifies x as dependant variable
Hello my code is : data = [12;8;7;10;16;15;12;12;20;19;19;17;20;16]; depth=[3.225;4.725;6.225;7.725;9.225;10.725;12.225;13.7...
1 year ago | 1 answer | 0
1
answerQuestion
How to use variogramfit function for my dataset?
Hello My data is: semivariogram values=[0; 5.953452709; 3.819761106; 0.168685691; 2.300182045; 0.015065368] la...
1 year ago | 1 answer | 0
1
answerQuestion
Why the nonlinear least square fitted curve is not a curve?
Hello Can anyone please tell me why the resulting fit is not a curve, though I have defined an exponential curve? Thanks Dat...
1 year ago | 3 answers | 0
3
answersQuestion
problem in using meshgrid and how to show the variation of a parameter in the field
Hello my code considers a mesh using gridmesh command: % Define the vertices v1 = [0, 0]; v2 = [20, 0]; v3 = [30, -10]; v...
1 year ago | 1 answer | 0
1
answerQuestion
how to draw a meshed geometry?
Hi I aim to write a code which draws a geometry and then mesh it! Could you please tell me how can I edit this code so it gives...
1 year ago | 1 answer | 0
1
answerQuestion
how to create a mesh within the geometry?
Hi There is a geometry like : How to plot the meshed geometry like this ?lets say the mesh dimension is 1*1
1 year ago | 1 answer | 0
1
answerQuestion
generate nonrepeated random field values for each Monte Carlo iteration
Hello If I want to generate different random field values (with the same statistical parameters) for different iterations of a ...
1 year ago | 1 answer | 0
1
answerQuestion
How to index and find the resulting matrix?
Hello There is a mesh where I have the coordinates of the centres of each element as seen in this image (16 elements in total w...
1 year ago | 1 answer | 0
1
answerQuestion
generate correlated random values in two dimension
Hello I want to generate a random field of values like this figure, where each element has the same mean and COV values and th...
1 year ago | 1 answer | 0
1
answerQuestion
How to omit/edit some elemental coordinates of a matrix
Hello I have a rectanglular grid (28.66*10)m with the element dimension (1.433*1)m. On the other hand, there is a slope with v...
2 years ago | 1 answer | 0
1
answerQuestion
How to get the total simulation time as an output in Matlab
Hello I am running a simulation in MatLab which outputs some parameter values as I am using save command. What code can I use t...
2 years ago | 0 answers | 0
0
answerssolving an equation not by sym
Thanks for yur response. Ok, let me explain in detail. In equation below, E(1,1)=0, E(2,1) has E(1,1) inside it, in the same lin...
2 years ago | 0
Question
solving an equation not by sym
Hello My equation is developed in a step-by-step manner as follows with some assumptions. x is the unknown in here. This is jus...
2 years ago | 4 answers | 0
4
answersQuestion
why my matlab code calculates the inequality wrongly?
Hello I am defining inequility for a condition; however, Matlab cannot compare two sides correctly as is attached here. How sho...
2 years ago | 1 answer | 0
1
answerQuestion
omit rows of matrix based on a condition
Hello My matrix B is : [0.25 0 0; 0.5 -4.91 -4.9; 0.75 -4.94 -4.96; 1 -4.985 -5; 1.25 -5 -5; 1.5 -5 -5; 1.75 -5 -5] H...
2 years ago | 3 answers | 0
3
answersQuestion
using Maximum Likelihood Estimation (MLE) to find the correlation length of a set of data
Hello I have a set of data with normal distribution. I know we can estimate the population parameters using MLE which are the m...
2 years ago | 0 answers | 0
0
answersQuestion
How to get a logical output if all the arrays of a matrix are NAN and the matrix is a string
Hello The matrix, F I have is: F = 1×8 string array "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" I ...
2 years ago | 1 answer | 0
1
answerQuestion
How to draw a complicated graph
Hello This is the simplest form of the graph that I want to plot. At first, I am going to draw the x-Z-Y graph when K=0. Imagin...
2 years ago | 1 answer | 0
1
answerQuestion
substitue a matrix into another with some conditions
Hello I have a matrix like: A=[1 1;2 1;3 1;1 2;2 2;3 2;1 3;2 3;3 3] and another B=[4 1; 5 1; 4 2; 5 2; 4 3; 5 3] The cond...
2 years ago | 1 answer | 0
1
answerQuestion
deleting some of the arrays in a matrix based on a principle
Hello I have a matrix of numbers for example: [10; 20; 30; 40; 50; 60; 70; 80; 90;...;160] which are assigned to a mesh in ord...
2 years ago | 1 answer | 0
1
answerQuestion
if the imaginary part of a complex number is zero
Hello Here is my code where I want to see if the imaginary part of a number is zero then int=int+1; however, the imaginary part...
3 years ago | 1 answer | 0
1
answerQuestion
fsolve yields wrong answer
Hello It is an example of many equations in my lengthy code. I want to use fsolve to solve it as it is more efficient; however,...
3 years ago | 3 answers | 0
3
answersQuestion
fortran subroutine includes several other subroutines
Hello I want to write a Mex file to import data from a Fortran 77 subroutine in MatLab. However, this subroutine includes sever...
3 years ago | 1 answer | 0
1
answerQuestion
Error using mex No supported compiler was found.
Hello My matlab version is R2019b. I have visual studio 2017 with intel oneAPI 2021 installed. However, when I type the follow...
3 years ago | 1 answer | 0
1
answerQuestion
use mvnrnd with some conditions
Hello Consider this example in MathWorks website: n=1000; sigma=0.5; Sigmalnd=sigma.^2.*[1 0; 0 1]; rng(default); ZIn...
3 years ago | 1 answer | 0
1
answerQuestion
Brace indexing is not supported for variables of this type.
Hello I have got this error message: Error in cell2mat (line 36) if isnumeric(c{1}) || ischar(c{1}) || islogical(c{1}) ...
3 years ago | 1 answer | 0
1
answer
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