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Aisha Mohamed


Last seen: 2 days ago Active since 2021

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what the difference between the phase and arctan?
Hi all When z=x+iy. I know (if I am correct ) that tan^-1(y/x) = arctan(y/x) =atan(y/x) = atan2(y,x) we use these expressi...

1 day ago | 1 answer | 0

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How to apply Taylor in this equation?
Hi all I am really sorry because I have just now found (Bruno Luong answered your question what does the positive and negative ...

8 days ago | 0 answers | 0

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why this overlap happen here?
Hi all I am working on this function f_b(1/z) = (0.10 − 0.3i)z −1 + (0.2121 − 0.0008i)z −2 + (0.9 + 0.001i)z −3 and I wrote it...

11 days ago | 0 answers | 0

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what does the positive and negative values concave mean?.
I am studying the behavoure of this function p=[(0.9000 - 0.0010i) (0.4243 + 0.0017i) (0.1000 + 0.3000i)]; and when I plotted ...

20 days ago | 1 answer | 1

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Answered
where the jump of the phase function happen?
Thanks Bruno I know my a little information do not compare with expers like you and other experts in this group, but really I w...

26 days ago | 0

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Question


where the jump of the phase function happen?
I know that (if Iam correct), phase(f(z)) =arctan(f(z)) ,(where f(z) is complex number ) is multivalued function, that means fo...

27 days ago | 2 answers | 0

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Where is the wrong in this code??
Because I trust the answers of all the Matlab experts in this group, and I thank all of them. The genius expert Torsten saw that...

1 month ago | 1 answer | 0

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Question


why the figure of cos function does not symmetric around y axis?
I am tring to describe the figurs of these function . fk(z) = (0.1000 + 0.3000i) + (0.4243 + 0.0017i)z + (0.9000- 0.0010i)z2 ...

1 month ago | 1 answer | 0

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Question


what dose z represent in this graph?
I am studying these graphs , and I really confused in some points here. 1- when we take arbitrary point in this figure for exam...

1 month ago | 0 answers | 0

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Question


Why the figure of the phase discontinuous?
I ploted these function by MATLAB p=[ ( 0.9000 - 0.0010i) (0.4243 + 0.0017i) (0.1000 + 0.3000i) ]; %this function deno...

1 month ago | 1 answer | 0

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Question


What dose this mean?
I know the magnitude of complex number a+ib is the sqrt(a^2+b^2).and the magnitude of the complex function for examble (f(z)=ab...

1 month ago | 2 answers | 0

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Question


is this expression right in MATLAB?
Hi I know when I want to write the polynomial f(z) = (0.0001) + (0.0174)z + (0.9999)z2 in MATLAB it will be in this ...

2 months ago | 1 answer | 0

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Question


Is it necessary to use the same period of zlim and caxis when we plot the second order function and its cosin?
I am tried to plot the second order function (thank you very much for all who helped me to do that ) . My question is Is it ...

3 months ago | 0 answers | 0

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Question


How to plot cosine of complex function of third degree?
I plot the phase of this function fb(z) = (0.1496 − 0.1692i)z^−1 + (0.2472 + 0.0916i)z^−2 + (−0.8196 − 0.3718i)z^−3 by using ...

3 months ago | 0 answers | 0

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Question


how can I plot the cosine of this function f(1/z) = (0.1000 -0.3000i)z^-1 + (0.2121-0.0008i)z^-2 + (-0.9000-0.0010i)z^-3
How can I plot the cosin of this complex function: f(1/z) = (0.1000 -0.3000i)z^-1 + (0.2121-0.0008i)z^-2 + (-0.9000-0.0010i)z^...

3 months ago | 0 answers | 0

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Question


How can I plot this function such as all values of |f(1/z)| be more clear and how can I plot the cosine of the phase of this function ?
When I plot this function (thanks for every help). f(1/z) = (0.1000 -0.3000i)z^-1 + (0.2121-0.0008i)z^-2 + (-0.9000-0.0010i)z^...

3 months ago | 1 answer | 0

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Question


how to put many small text boxes that display information about individual data points in the same figure?.
I am trying to use data cursor in Matlab to identfy many point in the same figure, but the previous point disapper when I identi...

3 months ago | 1 answer | 0

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Question


I used different codes to plot the phase of this function f(z) = (0.10 + 0.3i) + (0.4243 + 0.0017i)z + (0.9 − 0.001i)z^2 why I always find discontinuity at Z_R =0
I used the folloing 2 codes from Davidgoodman and Torsten (Thank you very much for all of them) respectivally to plot this fu...

4 months ago | 0 answers | 0

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why we find discontinuity when we plot this analytic function \begin{align*} f(z) =(0.5+000i)+(0.5000 + 0.8660i) z+(-0.2500+0.4330i)z^2 \end{align*}
I used the code which is provided by TORSTEN(Thank you so much) to plot this function: $ f(z) =(0.5+000i)+(0.5000 + 0.8660i) z...

4 months ago | 0 answers | 0

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Question


I plot these two functions by Matlab but the phase of the both of them look likes strange and I think the plot of the phase is wrong in both of them
I plot these two functions by Matlab but the phase of the both of them look likes strange and I think the plot of the phase is ...

4 months ago | 0 answers | 0

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Question


How to calculate and plot this function f(z) =\frac{1}{2}[\frac{(z^3)-(0.5+0.8660i)}{z^4-(0.5-0.8660i)z^3}]
How can I simplify and plot this function: $ f(z) =\frac{1}{2}[\frac{(z^3)-(0.5+0.8660i)}{z^4-(0.5-0.8660i)z^3}] $ I a...

5 months ago | 1 answer | 0

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Question


How to plot the magnitude and the phase of this function f(1/z)=(0.5 + 000i)*z^(−1 )+ (0.2500 − 0.4330i)*z^(−2) + (−0.2500 − 0.4330i)*z^(−3)?
Thank you for every one helped me to understand how to plot comples function ,Torsten and David xplain ed different ways to ...

5 months ago | 1 answer | 0

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Question


How the plot of the phase of the complex function look likes BY USING THE MATLAB?
I HAVE THIS COMLEX FUNCTION: f(z)=(0.5)+(0.5+0.8660i) z+(-0.25+0.4330i) z^2 firistly, how to plot the phase and magnitude of...

5 months ago | 1 answer | 0

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Question


What does the phase of complex function mean and how can I plot it in matlab?
I know that any complex number has a magntude and argument in the complex plane where the magnitude represent the length of the ...

5 months ago | 0 answers | 0

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how to label the axes when I want to plot the complex function in the case of( the phase of f(1/z) )?
I have received the following great answer for this question (how to plot the function f(1/z) in matlab where z is any complex n...

5 months ago | 0 answers | 0

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Question


what the difference between the phase of f(z) and |f(z)|
I want to plot the complex function f(z) and I am tring to plot |f(z)| as well , but I can not understand what the difference be...

5 months ago | 1 answer | 0

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Question


how to write zeta in matlab
Hi I am trying to legend the roots of my function as zeta1,zeta2.... I used this answer, figure(); x = real(r0); y = i...

6 months ago | 1 answer | 0

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Question


What the difference between plotting the function f(z) (where its coefficients change with time) and plot of its zeros which evolves with time t
I use this function which has coefficints change with time t first I plotted its roots (which evolve with time t) an I have got...

6 months ago | 1 answer | 0

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Question


how to distinguish between four zeros in matlab plotting
I ploted the zeros of the function f(z), where z is a complex number and its rootes are complex numbers. for example When f(z) ...

6 months ago | 1 answer | 0

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Question


How to plot the function f(1/z) in matlab where z is any complex number where te coefficients evolve with time t
I am trying to plot the functions f(z) and f(1/z) where z is complex numper and the coefficients of both functions evolve with ...

6 months ago | 0 answers | 0

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