Community Profile # Pooneh Shah Malekpoor

Last seen: 11 jours il y a Actif depuis 2020

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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...

environ un mois il y a | 1 réponse | 0

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Question

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 ...

environ 2 mois il y a | 1 réponse | 0

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Question

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: ...

5 mois il y a | 1 réponse | 0

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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...

5 mois il y a | 2 réponses | 0

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Question

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...

6 mois il y a | 1 réponse | 0

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Question

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...

6 mois il y a | 1 réponse | 0

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Question

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...

6 mois il y a | 3 réponses | 0

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Question

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...

8 mois il y a | 1 réponse | 0

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Question

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...

8 mois il y a | 1 réponse | 0

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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

8 mois il y a | 1 réponse | 0

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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 ...

9 mois il y a | 1 réponse | 0

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Question

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...

9 mois il y a | 1 réponse | 0

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Question

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...

9 mois il y a | 1 réponse | 0

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Question

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...

10 mois il y a | 1 réponse | 0

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Question

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...

environ un an il y a | 1 réponse | 0

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A répondu
solving 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...

environ un an il y a | 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...

environ un an il y a | 4 réponses | 0

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Question

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...

environ un an il y a | 1 réponse | 0

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Question

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...

environ un an il y a | 3 réponses | 0

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Question

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...

environ un an il y a | 1 réponse | 0

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Question

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 ...

environ un an il y a | 1 réponse | 0

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Question

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...

plus d'un an il y a | 1 réponse | 0

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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...

plus d'un an il y a | 1 réponse | 0

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Question

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...

presque 2 ans il y a | 1 réponse | 0

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Question

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...

environ 2 ans il y a | 1 réponse | 0

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Question

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,...

environ 2 ans il y a | 3 réponses | 0

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Question

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...

environ 2 ans il y a | 1 réponse | 0

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Question

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...

environ 2 ans il y a | 1 réponse | 0

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Question

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...

plus de 2 ans il y a | 1 réponse | 0

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Question

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}) ...

plus de 2 ans il y a | 1 réponse | 0

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