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Last seen: oltre 3 anni fa | Attivo dal 2018

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Domanda

How to solve the equation of binary logic operation, where all unknowns are 0 or 1
For example, I have the following equations, linear equations and nonlinear equations, in which the unknowns can only take 0 or ...

oltre 3 anni fa | 1 risposta | 0

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Domanda

how to solve the integro-diffenertial equation?
i want to get the solution of this ode b33 = 20*(2.52077405993092./(46.4663900509659 + (omega-1).^2 - ... 11.831692990...

oltre 4 anni fa | 0 risposte | 0

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Domanda

how to plot figure of expression with `in RootOf`?
i use ilaplace to get the output signal but how to plot the output signal `xt` codes are as this syms t s gs=(5*s + 4)/(s^4 +...

oltre 4 anni fa | 1 risposta | 0

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Domanda

the reult is different using `ilaplace` and `lsim `
i just want to get the output when i know the input signal and trans fer function however when i use 2 methods they are differen...

oltre 4 anni fa | 0 risposte | 0

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Risposto
why i can use the Voltage Measurement and Current Measurement in the simulink?
i was curious how to distinguish which block is from dufferent libary?from solver configuration?

oltre 4 anni fa | 0

Domanda

the integral of two methods are so different,can we trust the matlab anymore?
the integral of two methods are so different,can we trust the matlab anymore? codes are as this clc; clear all; close all; ...

oltre 4 anni fa | 1 risposta | 0

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Domanda

why i can use the Voltage Measurement and Current Measurement in the simulink?
questions are as this 1,in circuit 1,why i can't use the Voltage Measurement and Current Measurement in the simulink? 2,i ju...

oltre 4 anni fa | 2 risposte | 2

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Domanda

How to run the main program and function files as well as function files and function files in an m file?
How to run the main program and function files as well as function files and function files in an m file? the version is r201...

oltre 4 anni fa | 1 risposta | 0

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Domanda

How to define variables in the main program instead of in the function file
I want to use a loop in the main program to make a the different value, and then get different graphics, but without defining...

oltre 4 anni fa | 1 risposta | 0

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Domanda

Defining font size in legend does not work
i define the font size of the legend in this way,it doesn't work size=15; legend1=legend(',,,',',,,','FontSize',size)) bu...

quasi 5 anni fa | 1 risposta | 1

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Domanda

Why doesn't legend distinguish colors?
when plotting the figures, figure 1 Legend distinguishes colors and the figure 2 legend doesn't,why? codes are as this clc; ...

quasi 5 anni fa | 2 risposte | 0

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Domanda

How to use matlab to call c + function file and draw？
The following c++ function file is a formula that contains some piecewise functions. Let's first assume that Re=2320, so how to ...

quasi 5 anni fa | 1 risposta | 0

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Domanda

Variable is in a function file, how do I use a loop to change the value of this variable?
If the variable is in the main program, I can compile a loop to change the value of a variable and get the result with the varia...

quasi 5 anni fa | 2 risposte | 0

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Domanda

How to remove the connection between head and end？
Why is the data at the end of the first group and the beginning of the second group connected? using plot3 and codes are as ...

quasi 5 anni fa | 1 risposta | 0

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Domanda

the cpoy and paste of matrix will change the rank?
i use the following codes to get the matri of A , and the rank of A is 10,but when i copy the A and recalculate the rank of a,i...

quasi 5 anni fa | 1 risposta | 0

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Domanda

System is rank deficient. Solution is not unique.
when i use 'equationsToMatrix',the roots is so big,for example, a0 = - 3.709974539e221 + 1.690416187e223*i a1 = ...

quasi 5 anni fa | 0 risposte | 0

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Domanda

If the integral decomposition solution is not obtained, what integral method can be used to get the closest value?
codes are as this, if all the value except the r are 1, what integral method can be used to get the closest value? syms d z r;...

quasi 5 anni fa | 1 risposta | 0

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Domanda

‘’fprintf‘’ cannot be used in a loop？
i just want to use 'fprintf' to print some calculating results,can't it be exculated in the loop? codes are as this syms a...

quasi 5 anni fa | 1 risposta | 0

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Domanda

the 'fprintf' problem
codes are as this name = 'Alice'; age = 12; X = sprintf('%s will be %d this year.', name, age) y= fprintf('%d will be %...

quasi 5 anni fa | 1 risposta | 0

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Domanda

Why does the system of linear equations get a large solution, and the checking calculation is no problem?
omega=1.795200; m0=7.234737; m1=1.816835; m2=5.349043; m3=8.732933; m4=12.024736; m5=15.265388; m6=18.476340; m7=2...

quasi 5 anni fa | 0 risposte | 0

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Domanda

How to accelerate the following code using 'equationsToMatrix'?
i just want to solve the 20 linear equations with 'equationsToMatrix',but it really runs out a lot of time,so how to accelerate ...

quasi 5 anni fa | 0 risposte | 0

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Domanda

The difference between using and not using '' in the solve() function
what is The difference between using and not using '' in the solve() function? and should we use '' ? codes are as this clc...

quasi 5 anni fa | 1 risposta | 0

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Domanda

The solution of the nonlinear equation obtained by ‘fzero’ is different from that of 'fsolve'.
i use the 'fzero' and 'fsove' to get the roots of the nonlinear equation,and the function figure is as this ,so we can see the ...

quasi 5 anni fa | 1 risposta | 0

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Domanda

How to improve the accuracy of drawing, especially for infinite functions？
in some plot assignments,we can use 'ezplot' to plot the more accurate figure but for infinite functions the 'ezplot' still can'...

quasi 5 anni fa | 1 risposta | 1

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Domanda

can you define an interval When you use 'fsolve' to define the initial value？
for one dimentional question, when use fzero to get the roots ,we can define the intitial value as an interval [x1,x2] but ...

quasi 5 anni fa | 1 risposta | 0

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Domanda

the problem of using 'case'
i want to use a loop of omega and when the omega has diffreent value ,the m0,m1,m2...have the different value,so in the loop i u...

quasi 5 anni fa | 1 risposta | 0

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Domanda

How to get the first Ten Solutions of nonlinear equations
how to get the only one root of f==0 and the first 10 positive roots of g==0, and when i change the value of omega it will...

quasi 5 anni fa | 0 risposte | 0

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Domanda

why it can't be used as a number?
i get the two numbers,but why it can't be used as the number? codes are as this clc; clear all; close all; a_0k =... ...

quasi 5 anni fa | 1 risposta | 0

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Domanda

why use the equationsToMatrix can get the precise result?
Why do you use equationsToMatrix to get the root and bring back the equation, which is not exactly 0? codes are as this clc;...

quasi 5 anni fa | 1 risposta | 0

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Domanda

Which version can support the naming of m files in Chinese and the use of space naming?
excuse me,Which version can support the naming of m files in Chinese and the use of space naming? thanks a lot!!!

circa 5 anni fa | 1 risposta | 0

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Carica altro

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