Question

In order to facilitate the calibration of a new pressure measurement system it is desired to write a complete Matlab program to record a number of measurements for later analysis. The program should incorporate the features described below. The measurements will be in gage pressure and therefore may be positive or negative. The total number of measurements to be made will not be known at the beginning of the measurement process. The main function should do the following: a) Prompt the user to input each pressure. b) Store each measured pressure in a one-dimensional array, P. c) Count the number of measurements made and store this number in a variable called n d) Send P and n to a sub-function The sub-function will do the following: e) Determine the highest and lowest pressures recorded. f) Send these two pressure values back to the main function where they will be written to the screen using fprintf statement. The two pressure values should appear on the same an line.

Answer 1

% main function

function main
clc
clear

P = input('Enter pressure values as [val1,val2,...,valN]: ');
n = numel(P); % counting the number of values of pressure entered

% sending P and n to the sub-function named getHighestLowestPressure to
% compute and return Highest and Lowest presure
[Lowest,Highest] = getHighestLowestPressure(P,n);

%displaying the lowest and highest pressure in one line using fprintf
fprintf(['\nLowest Pressure is ' num2str(Lowest) ', Highest Pressure is ' num2str(Highest) '\n'])
end

----------------------------------------------------------

% sub function
function [Lowest,Highest] = getHighestLowestPressure(P,n)

% initializing both Highest and Lowest pressure to the first value of pressure entered
Highest = P(1);
Lowest = P(1);

for i=1:n
  
% computing the Highest
if P(i)>Highest
Highest = P(i);
end

% computing the Lowest
if P(i)<Lowest
Lowest = P(i);
end
  

end

end

------------------------------------------------

[vall, val2, . . .,valN] [23,90,-12, 18,45] Enter pressure values as Lowest Pressure is -12, Highest Pressure is 90

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