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Lin LI


Con actividad desde 2011

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why do lsqnonlin and fmincon give different optimization results when solving a set of nonlinear equations?
I tried to solve a set of nonlinear equations using lsqnonlin and fmincon. All the input parameters (including initial values) a...

más de 11 años hace | 1 respuesta | 0

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why does the fist code give me warning while the second code works well?
why does the fist code tells me minimum step size reached, while the second one give me no warnings? Thank you very much for you...

más de 11 años hace | 1 respuesta | 0

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what is the reliable way to solve a set of nonlinear implict equations without using Jocabian ?
I have a nolinear problem ,which is to solve a set of nonlinear implict equations.It is impossible to get the Jocabian of the ...

más de 11 años hace | 0 respuestas | 0

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one case can not be initiatated when plotting using switch-case
when running the following code, case n=0.6 can not be implemented. for n=0.2:0.2:0.8 switch n case...

alrededor de 12 años hace | 1 respuesta | 0

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fzero problem when doing integration using quadl.
1. I am trying to do an integration using quadl, so I need to define an inline function first. But this inline function is som...

más de 12 años hace | 1 respuesta | 0

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why and when does a warning "Minimum step size reached; singularity possible." appear when using the function quad?
why and when does a warning "Minimum step size reached; singularity possible." appear when using the function quad? can anyb...

casi 13 años hace | 0 respuestas | 0

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Can I trust the quad integration results with a warning of "minimum step size reached"?
I have two different codes to calculate the integration. The first one uses int, the second one uses quad. The first one is ca...

casi 13 años hace | 2 respuestas | 0

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A never used variable's index out of bounds! From the function quadl? weird, dont know why.
I run this code and it gave me error message, and it seems that this problem comes from the function quadl, because the variable...

casi 13 años hace | 1 respuesta | 0

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can anybody give me a example showing how to avoid division by 0 by using try-catch?
can anybody give me a example showing how to avoid division by 0 by using try-catch? thank you very much!

casi 13 años hace | 2 respuestas | 0

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why does matlab report "??? Index exceeds matrix dimensions"?
I have worked on my problem for a long time,but I could not find why matlab report "??? Index exceeds matrix dimensions". Can ...

casi 13 años hace | 1 respuesta | 0

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how to avoid dividing by zeros.
i run a code but it gave me warnings that Warning that dividing by zero and index exceeding matrix dimensions. I looked into it ...

casi 13 años hace | 3 respuestas | 0

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what functions can be used to do a non-scalar limits of integration?
I want to do an integration with non scalar limits of integration, quad and int seem not working,because Bl and Br are vectors. ...

casi 13 años hace | 1 respuesta | 0

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how can i transfer a variable's value from one function to another?
I want to transfer ther value of Protrusion(i) from function G_yi to function sumin, in other words, I want to use the value of...

casi 13 años hace | 2 respuestas | 0

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why does matlab give me a message that a never-used varible is undefined?
I have changed the int to quad, so that the computing velocity increased a lot . I have solved this problem ,thank you !

casi 13 años hace | 0

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why does matlab give me a message that a never-used varible is undefined?
The first part is the main M file, the second part is a function M file. When it is run, a message "Undefined function or method...

casi 13 años hace | 2 respuestas | 0

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