Community Profile # Najmeh Eskandari

Last seen: más de 1 año ago Active since 2018

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Question

How matlab converts data from linear scale to log scale?
Hi. I plot the figure from column 2 (as x) and column 6 (as y) in excel file in linear and log scale. Why 1500 in linear scale ...

casi 2 años ago | 1 answer | 0

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Question

change position of axes in plot3d?
Hi. when i use plot3d the locations of axes are as shown in screenshot 167. How can i change them like screenshot 170 ? Thanks...

más de 3 años ago | 1 answer | 0

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Question

Compare two or more cell arrays with a specific tolerence?
Hi. I have a cell array with length 3 : M_t={{[0,1],[0 0 2]},{[0,1.01],[0 0 2]},{[0,1],[0 .001 2]}}; I want to compare these ...

más de 3 años ago | 1 answer | 0

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Question

How to check if there is any field in structure?
Hi. I have a structures with no field and want to check is there any field in it or no? L1=struct(); isempty L1 the result i...

más de 3 años ago | 2 answers | 1

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Question

Update field value in structures?
Hi. I have structure L with field L0. L0 has two fields:H0 and H1. H0=struct('h',[0,0],'Q_centroids',[-5,0,5,0],'Q_actions',[1...

más de 3 años ago | 1 answer | 0

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Question

Compare class type of two variables?
Hi. I want to check the h class and then if is cell print something.I write the code: L0={[0,0],[0,0],[.5,.51,.5,.51,.5,.51],[...

más de 3 años ago | 1 answer | 0

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Question

access data in nested arrays in a structure?
Hi. I want to calculate r through structure L: L=struct('L0',{{[0,0],[0,0],[.5,1,2,3,5,4],},{[0;1],[0,2],[-4,1,2,3,5,10],[2...

más de 3 años ago | 1 answer | 0

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Question

access data in structure?
Hi. I store some data in structure : H0=struct('h',[0,0],'Q_centroid',[0,0],'Q_action',[.5,.51,.5,.51],'Q_table',); H1=str...

más de 3 años ago | 1 answer | 0

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Question

Error using horzcat Dimensions of arrays being concatenated are not consistent?
hello. i solve some differential equation with ode45. The answers are correct and there is no error.because i want to show some...

más de 3 años ago | 1 answer | 0

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Question

when i use tripleangle command in matlab it doesnot answer?
hi.i have installed robotics toolbox recently.when use commands from robotics,vision and control (peter corke) it is correct but...

más de 3 años ago | 2 answers | 0

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Question

when i run the simulation it hungs?
hi. when i run the simulation which is attached it hangs. there is no error and i do not know what is the problem. (matlab versi...

más de 3 años ago | 1 answer | 0

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Question

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space error in matlab?
hi. when I run my m file and then copy generated function to paste it is a Simulink block there is this error: at com.mathwo...

casi 4 años ago | 1 answer | 0

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Question

when i use matlabFunction command matlab takes a long time to run it and then hangs?
hi. I run the m file which is attached without 198 line(197 and 199 lines are in code) and matlab works correctly but when I add...

casi 4 años ago | 1 answer | 0

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Question

how can i import data from mat file to simulink?
Hello. I have a simple simulation: a matlab function block, clock(t as an input),scope and a from file block. acos [variable nam...

casi 4 años ago | 1 answer | 0

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Question

What should we do when Text exceeds maximum line length for Command Window display in matlab?
hi.I want to run the MFILE and (see D matrix) which is attached but there is an error : Text exceeds maximum line length for ...

casi 4 años ago | 2 answers | 0

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Question

This function does not fully set the dimensions of output port 2 error in matlab?
hi. I simulated impedance control for ur10.but there is an error: Error in default port dimensions function of S-function 'im...

casi 4 años ago | 2 answers | 0

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Question

keep just positive or just negetive answer of acos?
I have arccos and I want to keep just negative answer of it? how can I do it?(there are two answer)

alrededor de 4 años ago | 1 answer | 0

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Question

'Domain error. To compute complex results from real x, use 'acos(complex(x))' error in matlab?
hi.i want to simulate ur10 inverse kinematic and I did it.while running there is this error: Domain error. To compute complex...

alrededor de 4 años ago | 1 answer | 0

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Question

undefined function or variable error in matlab simulink?
hi.i want to simulate ur10 kinematic(inverse and forward) but when I run I have these errors(screenshot which is attached). the ...

alrededor de 4 años ago | 1 answer | 0

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Question

plot function in matlab?
I want to plot qi=q0+3*(qf-q0)*t^2-2*(qf-q0)*t^3 as defined in the picture.i use plot or ez plot but the figure that is drawn is...

alrededor de 4 años ago | 1 answer | 0

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alrededor de 4 años ago | 1 answer | 0

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Question

how can i assign values to symbolic matrix?
hi. I have the matrix B in symbolic form and I want to calculate it for different values and assign different symbols to it? wha...

alrededor de 4 años ago | 1 answer | 0

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Question

error in syms line 56?
hi. I want to run syms x(t) but there is this error: error using assignin(invalid variable name x(t) in assigne error i...

alrededor de 4 años ago | 1 answer | 0

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Question

Missing symbol 'mxArrayClassIDName' in 'D:\matlab/bin/win64\libmx.dll' error?
I want to open a mexw64 file in matlab but there is these errors: Invalid MEX-file Missing symbol 'mxArrayClassIDName' in 'D:\...

alrededor de 4 años ago | 1 answer | 1

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Question

how to fix Cannot find an exact (case-sensitive) match for 'link' error ?
hi.i want to creat ur10 in matlab .I use this code: function URrobot = UR_robot() offset = [0 0 0 0 0 0]; ...

alrededor de 4 años ago | 1 answer | 0

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Question

Hello. I want to generate this signal in Simulink: c=0:.001:1; h=3; x_0=0; x_d=x_0 + h*(c-sin(2*pi*c)/(2*pi)); but I don't ...

alrededor de 4 años ago | 1 answer | 0