# Shared Flashcard Set

## Details

ME 303 Binghamton University
7
Engineering
05/15/2008

Term
 fzero(?)
Definition
 (@function,xo)  xo  is an initial guessNote: xo could be a range (eg. [0 3])
Term
 A= [ 10 X 10 ]; A(:,5)=?
Definition
 10 values for the 5th column
Term
 solve for the following using MATLAB:y= x^5 + 3x^3 - 2*x^2 + 3when y = 0, x = ?
Definition
 roots([ 1 0 3 -2 0 3])
Term
 Write a short MATLAB script (program) that uses a while loop to divide the variable x by 2 until the value of x is less than 1.0e-6. The program should also count the number of times x was divided by 2. Before starting the while loop set x = 1.
Definition
 x = 1; i = 0; while x >=1e-6    x = x/2;    i = i + 1;  end
Term
 (7 pts) Write a MATLAB function m-file called prob5 that requires two input vectors x and y (with the same number of elements) and outputs two scalar values a and b, where a is the intercept and b is the slope from linear least-squares regression. Use the MATLAB polyfit command to determine a and b inside your function
Definition
 function [a, b] = prob5(x, y)p = polyfit(x, y, 1); b = p(1); a = p(2);
Term
 (6 pts) Use your function from question 5) above to fit data given in vectors x and y to a power-law of the form: Assume that x and y have been entered already in the MATLAB command window. Just write out the required statements to compute A and B using your function prob5.
Definition
 [a, b] = prob5(log10(x), log10(y)) B = b A = 10^a
Term
 If x = [1 2 3 4] and y = [0 1 4 9]. Write a MATLAB program that will determine the coefficients for polynomial interpolation (i.e., the polynomial that passes through the data points exactly).
Definition
 polyfit(x, y, 3)
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