For this, please do not use any built in MatLab functions that automatically calculate the product of matricies or the dot product of two vectors.
\%Your task for this lab assignment is to correctly implement \%the matrixmultiply function and the dotproduct function \%based on their comments, pseudocode, provided code, and examples. \%Assume arg1 is the name of an input file in the current working \%directory that contains the elements of the n by matrix A. \%Assume arg2 is the name of an input file in the current working \%directory that contains the elements of the m by r matrix B. \%Assume matricies A and B are compatible for matrix multiplication. \%Since the matrixmultiply function calls the dotproduct function, \%the dotproduct function should be implemented first. \%Do not use any built in functions or operators that automatically \%compute the product (multiplication) of matricies or the dot product. function [P]= matrixmultiply (arg1,arg2) A= readmatrix(arg1); \%initialize A from file B= readmatrix (arg2); \%initialize B from file \%initialize n to the number of rows in A \%initialize m to the number of columns in A \%initialize r to the number of columns in B if (m=size(B,1)) fprintf("Error: Multiplication is undefined for A and B. Goodbye. ") return; end \% use Matlab's display function to display A as shown in the examples \% use Matlab's display function to display B as shown in the examples % print the following as shown in the examples fprintf("Assume AB=P. "); fprintf("Dot product(s) for calculating P: "); % initialize P to an n by r matrix filled with zeros \% by using Matlab's zeros function \%Pseudocode for computing P. \% for each row i in P(i,j) % for each column j in P(i,j) % assign rowA to the ith row in A % assign colB to the jth row in B \% using the dotproduct function that you implented, % assign P(i,j) to the dotproduct of rowA and colB \% print the dot product as shown in the examples by using the code belov %fprintf("P(%i,%i)=",i,j); % printvectors (rowA, colB); % fprintf(" =%.4f ",P(i,j)); \% use Matlab's display function to display P as shown in the examples end \%Return d, the dot product of vectors x and y. \%Use loop(s), variable(s), and simple arithmetic operator(s) to \%to implement this function. You may use the size function. \%Do not use any built in functions or operators that calculate % the dot product automatically. function [d]=dotproduct(x,y) end \%Print a row vector u dot column vector v in a manner consistent \%with the provided examples. \%Do not change this function. function []=printvectors(u,v) \%print u n=size(u,2); fprintf( " [" ); for i=1:n1 fprintf("\%.4f", u(i)); end \%print. fprintf("\%.4f].", u(n)); \%print v fprintf(" ["); m=size(v,1); for i=1:m1 fprintf("\%.4f", v(i)); end fprintf("\%.4f]", v(m)); end
