Feeds
답변 있음
I can use functions- "sym()" and "syms()".
The functions |sym| and |syms| are part of the Symbolic Math Toolbox. Are you sure that you have the Symbolic Math Toolbox insta...
I can use functions- "sym()" and "syms()".
The functions |sym| and |syms| are part of the Symbolic Math Toolbox. Are you sure that you have the Symbolic Math Toolbox insta...
거의 13년 전 | 0
답변 있음
Removing exponents from a sysm class term
You can use |evalin| to do a substitution of the powers inside MuPAD: >> evalin(symengine, ['subs(', char(answer) ,', hold(_...
Removing exponents from a sysm class term
You can use |evalin| to do a substitution of the powers inside MuPAD: >> evalin(symengine, ['subs(', char(answer) ,', hold(_...
대략 13년 전 | 0
| 수락됨
답변 있음
Calculating Fourier Series Coefficients Using Custom Matlab Function
You forgot the index for assigning to |ak|. Also do you want the indefinite integral or an integral from 0 to 2*pi/w0? I added t...
Calculating Fourier Series Coefficients Using Custom Matlab Function
You forgot the index for assigning to |ak|. Also do you want the indefinite integral or an integral from 0 to 2*pi/w0? I added t...
대략 13년 전 | 0
답변 있음
Using latex command with anonymous functions
In R2012a I can do this: >> syms x y B(x) >> latex(B(x)) ans = B\!\left(x\right) >> latex(B(y)) ans = ...
Using latex command with anonymous functions
In R2012a I can do this: >> syms x y B(x) >> latex(B(x)) ans = B\!\left(x\right) >> latex(B(y)) ans = ...
13년 초과 전 | 1
문제를 풀었습니다
Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...
13년 초과 전
문제를 풀었습니다
Determine if input is odd
Given the input n, return true if n is odd or false if n is even.
13년 초과 전
문제를 풀었습니다
Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...
13년 초과 전
문제를 풀었습니다
Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...
13년 초과 전
문제를 풀었습니다
Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...
13년 초과 전
답변 있음
Solving a symbolic complex determinant by putting real and imaginary parts equal to zero??
Why do you split into real and imaginary part and solve both? I would expect this to work: S=solve(my_det, a1, a2) If I t...
Solving a symbolic complex determinant by putting real and imaginary parts equal to zero??
Why do you split into real and imaginary part and solve both? I would expect this to work: S=solve(my_det, a1, a2) If I t...
13년 초과 전 | 0
답변 있음
Solve: Working only sometimes
Some of your variable get 'Inf' in between. If you want to use variable precision arithmetic, make sure you use syms. I get a re...
Solve: Working only sometimes
Some of your variable get 'Inf' in between. If you want to use variable precision arithmetic, make sure you use syms. I get a re...
13년 초과 전 | 0
| 수락됨
답변 있음
How can I find the coefficients of the symbolic variables in a linear equation?
Maybe the thread <http://www.mathworks.de/matlabcentral/answers/41348-isolate-coefficients-of-multivariate-linear-polynomial Iso...
How can I find the coefficients of the symbolic variables in a linear equation?
Maybe the thread <http://www.mathworks.de/matlabcentral/answers/41348-isolate-coefficients-of-multivariate-linear-polynomial Iso...
13년 초과 전 | 0
| 수락됨
답변 있음
Isolate Coefficients of Multivariate Linear Polynomial
If you know that you have only linear terms and only |x|, |r|, and |y|, you could use |diff| to get the coefficients: syms x...
Isolate Coefficients of Multivariate Linear Polynomial
If you know that you have only linear terms and only |x|, |r|, and |y|, you could use |diff| to get the coefficients: syms x...
13년 초과 전 | 0
| 수락됨
답변 있음
How to symbolically differentiate a function with respect to a different function
It seems as if you cannot differentiate with respect to a symbolic function. Maybe it helps if you substitute phi_dot with a nor...
How to symbolically differentiate a function with respect to a different function
It seems as if you cannot differentiate with respect to a symbolic function. Maybe it helps if you substitute phi_dot with a nor...
13년 초과 전 | 0
| 수락됨
답변 있음
solve command
Seems to be the same problem as here: <http://www.mathworks.de/matlabcentral/answers/40281-substitution-after-differentiation-ea...
solve command
Seems to be the same problem as here: <http://www.mathworks.de/matlabcentral/answers/40281-substitution-after-differentiation-ea...
13년 초과 전 | 0
| 수락됨
답변 있음
Matlab simplify boolean expression
You have copied a MuPAD command. Did you use it inside a MuPAD Notebook? If not, type this at the MATLAB command prompt: mup...
Matlab simplify boolean expression
You have copied a MuPAD command. Did you use it inside a MuPAD Notebook? If not, type this at the MATLAB command prompt: mup...
13년 초과 전 | 1
답변 있음
integration
Why do you think that the answer is incorrect? If you just want a number, use |double| on the result: >> double(H0) ...
integration
Why do you think that the answer is incorrect? If you just want a number, use |double| on the result: >> double(H0) ...
13년 초과 전 | 3
답변 있음
Problem using subs in syms with matrix
The error raises in these lines: d=c(1); e=c(2); f=c(3); The variable |c| is a (1x1) sym and MATLAB cannot access the...
Problem using subs in syms with matrix
The error raises in these lines: d=c(1); e=c(2); f=c(3); The variable |c| is a (1x1) sym and MATLAB cannot access the...
13년 초과 전 | 0
답변 있음
Substitute 3 variables in this symbolic equation
Maybe in this case the suggestion from Walter scales better: [X, Y, Z] = ndgrid(5:5:30, 1100:100:1500, 1:0.5:3); WnetF = m...
Substitute 3 variables in this symbolic equation
Maybe in this case the suggestion from Walter scales better: [X, Y, Z] = ndgrid(5:5:30, 1100:100:1500, 1:0.5:3); WnetF = m...
13년 초과 전 | 0
답변 있음
Matlab solve the integration in version 2008 but doesn't solve it in version 2011b
It seems that MuPAD gets confused by the assumptions. At the moment, |int| gives a huge result in piecewises. If you do the foll...
Matlab solve the integration in version 2008 but doesn't solve it in version 2011b
It seems that MuPAD gets confused by the assumptions. At the moment, |int| gives a huge result in piecewises. If you do the foll...
13년 초과 전 | 0
답변 있음
problem in this integration
Not sure what you want to do. Could it be, that you meant this: syms T T0 P b = 0.141;cp0 = 38.12;h0 = 1684;R= 8.314;Act_W...
problem in this integration
Not sure what you want to do. Could it be, that you meant this: syms T T0 P b = 0.141;cp0 = 38.12;h0 = 1684;R= 8.314;Act_W...
13년 초과 전 | 0
답변 있음
solving nonlinear equations
I do get the following error message: Error using solve>processString (line 337) ' -0.0889=(-w^0.5*(w-1)^2*(w*(w+2)*sinh...
solving nonlinear equations
I do get the following error message: Error using solve>processString (line 337) ' -0.0889=(-w^0.5*(w-1)^2*(w*(w+2)*sinh...
13년 초과 전 | 0
| 수락됨
답변 있음
eval() returns NaN when my matrix gets really big.
Please try the following: double(vpa(evalin(symengine, ['subs(' char(X) ', T=' num2str(T) ')']))) This does the followin...
eval() returns NaN when my matrix gets really big.
Please try the following: double(vpa(evalin(symengine, ['subs(' char(X) ', T=' num2str(T) ')']))) This does the followin...
13년 초과 전 | 0
| 수락됨
답변 있음
How to solve equation using math symbolic and get erfinv as output?
Hi Caio, If you have MATLAB R2012a you can simpliy use the <http://www.mathworks.com/help/toolbox/mupad/stdlib/assume.html as...
How to solve equation using math symbolic and get erfinv as output?
Hi Caio, If you have MATLAB R2012a you can simpliy use the <http://www.mathworks.com/help/toolbox/mupad/stdlib/assume.html as...
13년 초과 전 | 1
| 수락됨
답변 있음
Error while converting a HUGE symbolic equation to double (question edited and simplified further)
Does this work? subs(subs(Wnet, x, 5:5:30)', y, 1100:100:1500) respectively subs(subs(SFC, x, 5:5:30)', y, 1100:100...
Error while converting a HUGE symbolic equation to double (question edited and simplified further)
Does this work? subs(subs(Wnet, x, 5:5:30)', y, 1100:100:1500) respectively subs(subs(SFC, x, 5:5:30)', y, 1100:100...
13년 초과 전 | 0
| 수락됨
답변 있음
Golden Search Optimization Technique
I'm not familiar with the Golden Search algorithm, but it seems that you are overwritting |fx| by accident. If I remove those li...
Golden Search Optimization Technique
I'm not familiar with the Golden Search algorithm, but it seems that you are overwritting |fx| by accident. If I remove those li...
13년 초과 전 | 1
| 수락됨
답변 있음
Wrong integration result with R2011b
Both answers are correct. Let me quote Wikipedia's entry for <http://en.wikipedia.org/wiki/Constant_of_integration Constant of i...
Wrong integration result with R2011b
Both answers are correct. Let me quote Wikipedia's entry for <http://en.wikipedia.org/wiki/Constant_of_integration Constant of i...
13년 초과 전 | 0
| 수락됨
답변 있음
Integration In Matlab
Just use |double|: syms r R1=sqrt(3)*(2*r.^2-1) R2=sqrt(3)*(2*r.^2-1) b = .7; S=2*pi*imag(int(exp(1i*b*R1)*...
Integration In Matlab
Just use |double|: syms r R1=sqrt(3)*(2*r.^2-1) R2=sqrt(3)*(2*r.^2-1) b = .7; S=2*pi*imag(int(exp(1i*b*R1)*...
거의 14년 전 | 0
| 수락됨
