Risposto

Why doesn't this code solve the equation?

Answered in <http://www.mathworks.com/matlabcentral/newsreader/view_thread/347804?s_cid=ans2doc_man_link http://www.mathworks.co...

Why doesn't this code solve the equation?

Answered in <http://www.mathworks.com/matlabcentral/newsreader/view_thread/347804?s_cid=ans2doc_man_link http://www.mathworks.co...

oltre 6 anni fa | 0

Risposto

Display a variable and its units

Units are now in MATLAB if you have Symbolic Math Toolbox. Try this, and see the tutorial: <https://www.mathworks.com/help/symbo...

Display a variable and its units

Units are now in MATLAB if you have Symbolic Math Toolbox. Try this, and see the tutorial: <https://www.mathworks.com/help/symbo...

oltre 6 anni fa | 0

| accettato

Risposto

How to add units to a number and differentiate between different inputs

Units are now in MATLAB if you have Symbolic Math Toolbox. Try this, and see the tutorial: <https://www.mathworks.com/help/symbo...

How to add units to a number and differentiate between different inputs

Units are now in MATLAB if you have Symbolic Math Toolbox. Try this, and see the tutorial: <https://www.mathworks.com/help/symbo...

oltre 6 anni fa | 0

| accettato

Risposto

how to set a unit to variable?

Units are now in MATLAB if you have Symbolic Math Toolbox. Try: >> u = symunit; >> x = 2*u.meter x = 2*[m] ...

how to set a unit to variable?

Units are now in MATLAB if you have Symbolic Math Toolbox. Try: >> u = symunit; >> x = 2*u.meter x = 2*[m] ...

oltre 6 anni fa | 3

| accettato

Risposto

Usage of roots and solve in MATLAB

1. To understand the difference between numeric and symbolic arithmetic, please see: <https://www.mathworks.com/help/symbolic/ch...

Usage of roots and solve in MATLAB

1. To understand the difference between numeric and symbolic arithmetic, please see: <https://www.mathworks.com/help/symbolic/ch...

oltre 6 anni fa | 1

| accettato

Risposto

Jacobian of equation with left and right hand sides

Starting R2017a, The "lhs" and "rhs" functions are available. See: <https://www.mathworks.com/help/symbolic/lhs.html?s_cid=an...

Jacobian of equation with left and right hand sides

Starting R2017a, The "lhs" and "rhs" functions are available. See: <https://www.mathworks.com/help/symbolic/lhs.html?s_cid=an...

oltre 6 anni fa | 0

Risposto

How to arrange equation variable on right and left hand side?

Starting R2017a, use the "isolate" function: <https://www.mathworks.com/help/symbolic/isolate.html?s_cid=ans2doc_man_link https:...

How to arrange equation variable on right and left hand side?

Starting R2017a, use the "isolate" function: <https://www.mathworks.com/help/symbolic/isolate.html?s_cid=ans2doc_man_link https:...

oltre 6 anni fa | 2

Risposto

How to plot the symbolic expression given by "root"

If I understand correctly, you're asking " _How can I automatically substitute values into a symbolic expression?_". Use the sub...

How to plot the symbolic expression given by "root"

If I understand correctly, you're asking " _How can I automatically substitute values into a symbolic expression?_". Use the sub...

oltre 6 anni fa | 0

Risposto

Error using integral: A and B must be floating-point scalars

To represent integration with symbolic variables, use "int" instead of "integral". <https://www.mathworks.com/help/symbolic/i...

Error using integral: A and B must be floating-point scalars

To represent integration with symbolic variables, use "int" instead of "integral". <https://www.mathworks.com/help/symbolic/i...

oltre 6 anni fa | 0

Risposto

Create a general function or script, where the user can specify the number of variables, which is both symbolic and possible to evaluate with fminunc?

* To use fminunc, first convert the Symbolic function to a MATLAB function using <https://www.mathworks.com/help/symbolic/matlab...

Create a general function or script, where the user can specify the number of variables, which is both symbolic and possible to evaluate with fminunc?

* To use fminunc, first convert the Symbolic function to a MATLAB function using <https://www.mathworks.com/help/symbolic/matlab...

oltre 6 anni fa | 0

Risposto

Help with piecewise function? Can't use else/if?

If you have R2016b, you can just use the piecewise function: <https://www.mathworks.com/help/symbolic/piecewise.html?s_cid=ans2d...

Help with piecewise function? Can't use else/if?

If you have R2016b, you can just use the piecewise function: <https://www.mathworks.com/help/symbolic/piecewise.html?s_cid=ans2d...

oltre 6 anni fa | 0

| accettato

Risposto

How to define ranges for solutions in this example

To specify ranges for multiple variables, see the last example on <https://www.mathworks.com/help/symbolic/solve-equations-numer...

How to define ranges for solutions in this example

To specify ranges for multiple variables, see the last example on <https://www.mathworks.com/help/symbolic/solve-equations-numer...

oltre 6 anni fa | 1

| accettato

Risposto

help to fix this numeric symbolic array

You can't have a "numeric symbolic" array because "numeric" and "symbolic" are different data types. For your options, see <http...

help to fix this numeric symbolic array

You can't have a "numeric symbolic" array because "numeric" and "symbolic" are different data types. For your options, see <http...

oltre 6 anni fa | 0

Risposto

Error using FEVAL Produced on an Attempt at calling fplot

First, a side note that you should format code in your posts: <https://www.mathworks.com/matlabcentral/answers/13205-tutorial-ho...

Error using FEVAL Produced on an Attempt at calling fplot

First, a side note that you should format code in your posts: <https://www.mathworks.com/matlabcentral/answers/13205-tutorial-ho...

oltre 6 anni fa | 1

| accettato

Risposto

How to convert strings to symbolic expressions without sym()?

Why do you need to convert strings to symbolic expressions? EDIT: Starting R2017b, use <https://www.mathworks.com/help/symbolic/...

How to convert strings to symbolic expressions without sym()?

Why do you need to convert strings to symbolic expressions? EDIT: Starting R2017b, use <https://www.mathworks.com/help/symbolic/...

oltre 6 anni fa | 1

Risposto

How can I compute Jacobi Elliptic Functions in Matlab where the modulus is > 1?

Starting R2017b, all Jacobi Elliptic functions in MATLAB with Symbolic Math Toolbox. Example: >> jacobiCD(1,3) ans = ...

How can I compute Jacobi Elliptic Functions in Matlab where the modulus is > 1?

Starting R2017b, all Jacobi Elliptic functions in MATLAB with Symbolic Math Toolbox. Example: >> jacobiCD(1,3) ans = ...

oltre 6 anni fa | 0

| accettato

Risposto

How to calculate imaginary part of incomplete gamma function in matlab.

You can find "gammainc" for imaginary input values using the Symbolic "igamma" function. Carefully read the note in the "Descrip...

How to calculate imaginary part of incomplete gamma function in matlab.

You can find "gammainc" for imaginary input values using the Symbolic "igamma" function. Carefully read the note in the "Descrip...

oltre 6 anni fa | 1

| accettato

Risposto

Matlab Numerical integral improvement

Updated answer for R2017b. Use <https://www.mathworks.com/help/symbolic/int.html?s_cid=ans2doc_man_link int> and convert the sym...

Matlab Numerical integral improvement

Updated answer for R2017b. Use <https://www.mathworks.com/help/symbolic/int.html?s_cid=ans2doc_man_link int> and convert the sym...

oltre 6 anni fa | 1

| accettato

Risposto

symb toolbox newby?

Please start with the Symbolic Getting Started: <https://www.mathworks.com/help/symbolic/getting-started-with-symbolic-math-tool...

symb toolbox newby?

Please start with the Symbolic Getting Started: <https://www.mathworks.com/help/symbolic/getting-started-with-symbolic-math-tool...

oltre 6 anni fa | 0

Risposto

Symbolic math solve numeric approximation

Question: When does the Symbolic Math "solve" statement try to find a numeric approximation? "solve" tries to find a symbolic...

Symbolic math solve numeric approximation

Question: When does the Symbolic Math "solve" statement try to find a numeric approximation? "solve" tries to find a symbolic...

oltre 6 anni fa | 0

Risposto

How to combine numerator and denominator in original form

The answer is in this example on the sym doc page: <https://www.mathworks.com/help/symbolic/sym.html#bu7u7ur-6?s_cid=ans2doc_man...

How to combine numerator and denominator in original form

The answer is in this example on the sym doc page: <https://www.mathworks.com/help/symbolic/sym.html#bu7u7ur-6?s_cid=ans2doc_man...

oltre 6 anni fa | 0

| accettato

Risposto

How do I convert a string input to an executable equation?

For symbolic equations, starting R2017b, use <https://www.mathworks.com/help/symbolic/str2sym.html?s_cid=ans2doc_man_link str2sy...

How do I convert a string input to an executable equation?

For symbolic equations, starting R2017b, use <https://www.mathworks.com/help/symbolic/str2sym.html?s_cid=ans2doc_man_link str2sy...

oltre 6 anni fa | 1

Risposto

symbolic evaluation where function is obtained from user input text

Starting R2017b, use <https://www.mathworks.com/help/symbolic/str2sym.html?s_cid=ans2doc_man_link str2sym>. >> prompt = 'in...

symbolic evaluation where function is obtained from user input text

Starting R2017b, use <https://www.mathworks.com/help/symbolic/str2sym.html?s_cid=ans2doc_man_link str2sym>. >> prompt = 'in...

oltre 6 anni fa | 2

| accettato

Risposto

How can I take the f(y)th-order derivative of another function?

Use |.*| instead of |*| , and for the why, look up those operators or simply search for your error |Inner matrix dimensions must...

How can I take the f(y)th-order derivative of another function?

Use |.*| instead of |*| , and for the why, look up those operators or simply search for your error |Inner matrix dimensions must...

quasi 7 anni fa | 0

Risposto

Can't find explicit solution

You can check Walter's suggestion that the solution is in limits as >> limit(dLdb,b,0) ans = NaN >> limit(dLdy0,b,...

Can't find explicit solution

You can check Walter's suggestion that the solution is in limits as >> limit(dLdb,b,0) ans = NaN >> limit(dLdy0,b,...

quasi 7 anni fa | 1

| accettato

Risposto

Integral of a gaussian function wrong answer

I could get the algebraic answer but it required calling "simplify" twice. Need to investigate this further. >> syms x A ...

Integral of a gaussian function wrong answer

I could get the algebraic answer but it required calling "simplify" twice. Need to investigate this further. >> syms x A ...

quasi 7 anni fa | 0

| accettato

Risposto

How to work with piecewise results that are returned by the solve() function

Honestly, the simplest solution is to upgrade to at least R2016b where "piecewise" was introduced in Symbolic Math Toolbox. Othe...

How to work with piecewise results that are returned by the solve() function

Honestly, the simplest solution is to upgrade to at least R2016b where "piecewise" was introduced in Symbolic Math Toolbox. Othe...

quasi 7 anni fa | 0

| accettato

Risposto

How to find the derivative of the function at some value of x?

To differentiate a function and then find the value, use symbolic functions. For details, see <https://www.mathworks.com/help/sy...

How to find the derivative of the function at some value of x?

To differentiate a function and then find the value, use symbolic functions. For details, see <https://www.mathworks.com/help/sy...

quasi 7 anni fa | 5

Risposto

Optimizing program to get faster results

Following up on my comment above: 1. Do not overwrite symbolic variables with numeric values. So don't do syms B D an...

Optimizing program to get faster results

Following up on my comment above: 1. Do not overwrite symbolic variables with numeric values. So don't do syms B D an...

quasi 7 anni fa | 0

Risposto

How can I solve A*X + X*B = C equation for X? where A, B&C are 2*2 matrixes.

You can solve this with the symbolic toolbox if you declare "X" as a matrix: >> X = sym('x%d',[2 2]) X = [ x11, x12] ...

How can I solve A*X + X*B = C equation for X? where A, B&C are 2*2 matrixes.

You can solve this with the symbolic toolbox if you declare "X" as a matrix: >> X = sym('x%d',[2 2]) X = [ x11, x12] ...

quasi 7 anni fa | 0