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Exam 2: ENGR 1120 - Programming with MATLAB questions well answers
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Exam 2: ENGR 1120 - Programming with MATLAB questions well answers
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Exam 2: ENGR 1120 - Programming withMATLAB
function [output variables] = function name (input variables) - correct answer ✔✔function definition
term
conv (a, b) - correct answer ✔✔Computes the product of the two polynomials described by the
coefficient arrays "a" and "b". The two polynomials need not be of the same degree. The result is the
coefficient array of the product polynomial.
[q, r] = deconv (num, den) - correct answer ✔✔Computes the result of dividing a numerator polynomial,
whose coefficient array is "num", by a denominator polynomial represented by the coefficient array
"den". The quotient polynomial is given by the coefficient array "q", and the remainder polynomial is
given by the coefficient array "r".
poly (r) - correct answer ✔✔Computes the coefficients of the polynomial whose roots are specified by
the vector "r". The result is a row vector that contains the polynomial's coefficients arranged in
descending order of power.
polyval (a, x) - correct answer ✔✔Evaluates a polynomial at specified values of its independent variable
"x", which can be a matrix or a vector. The polynomial's coefficients of descending powers are stored in
the array "a". The result is the same size as "x".
roots (a) - correct answer ✔✔Computes the roots of a polynomial specified by the coefficient array "a".
The result is a column vector that contains the polynomial's roots.
grid - correct answer ✔✔Displays gridlines at the tick marks corresponding to the tick labels in a graph.
plot (x, y) - correct answer ✔✔Generates a plot of the array "y" versus the array "x" on rectilinear axes.
plot (y) - correct answer ✔✔Plots the values of "y" versus their indices if "y" is a vector. Plots the
imaginary parts of "y" versus the real parts if "y" is a vector having complex values.
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