Michael
Posts:
5
Registered:
11/23/12


find location in matrix and print min and max for each column batch
Posted:
Nov 23, 2012 7:05 PM


I'm having an issue with the last part of an assignment. Part (b), ii and iii and part (e). I can't seem to be able to display the locations for part (b) or print the batch # corresponding to the min and max values for each row. Can anyone help?
"Consider the data file ?suture.txt? in Prob.512 (on page 150) of your textbook. The file contains information on batches of sutures that have been rejected during a one week period. Each line contains four columns of data (the batch number, temperature, pressure, and dwell time) . Place the content of suture.txt in a Matlab data file with the name ?suture.mat? in your current directory. Use the Matlab command ?load? to load the data file and place each column in an appropriate one dimensional array.
a) First verify the data file by printing the content of suture.mat in four columns. Be sure to label the four columns appropriately.
b) Write a userdefined function called func(a,b,x) with three input variables. Your function func should do the following: (i) print all the locations of the onedimensional array x that fall outside the interval (a,b), where b > a. (ii) print out the maximum value of x and its location. (iii) print out the minimum value of x and its location. (iv) return percentage of the elements of the onedimensional array x that are outside the interval (a,b), where b > a. Note: You may use the Matlab command ?find?.
c) Now using func, determine the percentages of rejected batches based on temperature, pressure, and dwell time.
d) Using your userdefined function func, print the batch numbers corresponding to rejected batches based on temperature, pressure, and dwell time. Also print the percent of batches that are rejected on the basis of temperature, pressure, and dwell time.
e) Print the batch number for the patient with the minimum and maximum temperature, pressure, and dwell time."
 Here is my main script:
% Problem 2: Data Files and UserDefined Functions
% State Problem 2 fprintf(' \n \n Problem 2 ');
% Load the suture.txt file s = load('suture.txt');
% Format the number display format shortg
% Display the data file in four columns fprintf(' \n \n Batch Number Temperature Pressure Dwell Time \n'); disp(s);
% Temperature c = s(:,2); [n,Max,Min,p] = func(150,170,c); fprintf('The rejected batch number(s) based on temperature is: %3.0f \n', s(n,1)); fprintf('The percent of rejected batches based on temperature is: %3.0f%% \n', p); fprintf('The batch number with minimum temperature is: %3.1f \n', Min); fprintf('The batch number with maximum temperature is: %3.1f \n \n', Max);
% Pressure c = s(:,3); [n,Max,Min,p] = func(60,70,c); fprintf('The rejected batch number(s) based on pressure is: %3.0f \n', s(n,1)); fprintf('The percent of rejected batches based on pressure is: %3.0f%% \n', p); fprintf('The batch number with minimum pressure is: %3.1f \n', Min); fprintf('The batch number with maximum pressure is: %3.1f \n \n', Max);
% Dwell Time c = s(:,4); [n,Max,Min,p] = func(2.0,2.5,c); fprintf('The rejected batch number(s) based on dwell time is: %3.0f \n', s(n,1)); fprintf('The percent of rejected batches based on dwell time is: %3.0f%% \n', p); fprintf('The batch number with minimum dwell time is: %3.1f \n', Min); fprintf('The batch number with maximum dwell time is: %3.1f \n', Max);
 Here is my data file info for which I need to find the values (save as suture.text): 24551 145.5 62.3 2.13 24582 153.7 63.0 2.52 26553 160.4 58.8 2.51 26613 159.5 58.9 2.02 26624 160.5 61.5 1.98 27725 170.9 62.5 2.03
 Here is my func function: function [n,Max,Min,p] = func(a,b,x) n = find(x<ax>b); Max = max(x); Min = min(x); p = (length(n)/length(x))*100; end

