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motherh
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Take f = 2x^2 + 1. When I run coeffs(f) in Matlab it outputs [2,1]. However I want it to output all the zero coefficients as well, for example [2 0 1] here. How do I do that?
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motherh said:Take f = 2x^2 + 1. When I run coeffs(f) in Matlab it outputs [2,1]. However I want it to output all the zero coefficients as well, for example [2 0 1] here. How do I do that?
To make Matlab output zero coefficients in an equation, you can use the "subs" function. This function allows you to substitute a specific value for a variable in an equation. For example, if you have the equation f=2x^2+1 and you want to make the coefficient of x^2 zero, you can use the command subs(f,x^2,0) to get the output f=1.
Yes, you can use a loop to make Matlab output zero coefficients in multiple equations. You can create a loop that iterates through a list of equations and uses the "subs" function to make the desired coefficient zero in each equation. This will save you time and effort compared to manually changing each equation.
Yes, you can use the "coeffs" function in Matlab to output only the coefficients of an equation. This function returns a vector containing the coefficients of the equation in descending order. You can then use this vector to manipulate or analyze the coefficients as needed.
If you are working with symbolic equations in Matlab, you can use the "coeffsym" function to make outputting zero coefficients easier. This function allows you to specify the variable and the desired coefficient to be zero in the equation. For example, you can use the command coeffs(sym('2x^2+1'), 'x^2') to get the output 2.
Yes, there is a built-in function in Matlab called "polyval" that can be used to make outputting zero coefficients in an equation easier. This function evaluates a polynomial at a specific value. So, if you have the equation f=2x^2+1 and you want to make the coefficient of x^2 zero, you can use the command polyval([1 0 2], x) to get the output f=1.