Mechanical Engineering Project Helper

Menu Driven Calculations

% ENGR2060
% Lab4

clear; clc;

% User input handling:

operation = 0;      % Operation to perform
array = 0;      % Array for calcuations

% Operation input:
fprintf( "Which operation do you wish to perform? \r\n");
fprintf( "(1) Arithmetic mean \r\n(2) Standard deviation \r\n(3) Harmonic mean\r\n" );

% Will loop until enter correct operation value. After error reporting, you
% can try again
while(1)
    operation = input( "Insert and press Enter: " );
    
    if((1 ~= length(operation)) || isempty(operation))
       fprintf( "Operation must be scalar value. Try again \r\n" );
       continue;
    end
    if((operation ~= 1) && (operation ~= 2) && (operation ~= 3))
       fprintf("Operation value is in ragne [0 3]. Try againg:\r\n");
       continue;
    else
       break; 
    end
end
input_number = 0;   % Variable holds input numbers

% Insert number loop, after some errors you can try again (ex. insert array instead of scalar value)
fprintf( "Insert number one by one (-99 is terminating): \r\n" );
while( -99 ~= array( end ) )
    input_number = input( "" );
    
    if( 1 ~= length(input_number) )
       fprintf( "You can insert numbers only one by one (scalar values). \r\n" );
       continue; 
    end
    
    array = [ array , input_number ];
end
array = array(2:end-1); % Discard terminator and initial zero

% Call calculation function
val = ASH( operation , array );

% Report result
if(1 == operation)
    
    fprintf("Arithmetic mean is: %d \r\n" , val);
    
elseif(2 == operation)
    
    fprintf("Standard deviation is: %d \r\n" , val);
    
elseif(3 == operation)
    
    fprintf("Harmonic mean is: %d \r\n" , val);
    
else
    
    error( "Operation value error.\r\n" );
            
end

function ret_val = ASH( operation , array )
%ASH Function calculates Arithmetic mean,
%standard deviation or harmonic mean
%   Input:
%       operation   -> 1, 2 or 3 for am, sd or hm respectively
%       array       -> array to perform calculations
%   Output:
%       ret_val     -> calculated value of am, sd or hm

arr_size = length(array);

% Error checking...
if(isempty(array) || 1 > arr_size)
   error( "Array must contain more then one number.\r\n" ); 
end
if(isempty(operation) || 1 ~= length(operation))
    error( "Operation must be singe value.\r\n" );
end
if((3 < operation) ||(1 > operation))
   error( "Operation range is [1 3]\r\n" ); 
end

% Calculations:
sumX = 0;
tmp = 0;
if(1 == operation)
    
    sumX = log(prod(exp(array)));
    ret_val = sumX/arr_size;
    
elseif(2 == operation)
    
    sumX = log(prod(exp(array)));
    meanX = sumX/arr_size;
    ret_val = sqrt(log(prod(exp((array - meanX).^2)))/(arr_size - 1));
    
elseif(3 == operation)
    
    sumX = log(prod(exp(1./array)));
    ret_val = arr_size/sumX;
    
else
    
    error( "Operation value error.\r\n" );
            
end


end % ASH

% ENGR2060
% Lab4

clear; clc;

% User input handling:

operation = 0;      % Operation to perform
array = 0;      % Array for calcuations

% Operation input:
fprintf( "Which operation do you wish to perform? \r\n");
fprintf( "(1) Arithmetic mean \r\n(2) Standard deviation \r\n(3) Harmonic mean\r\n" );

% Will loop until enter correct operation value. After error reporting, you
% can try again
while(1)
    operation = input( "Insert and press Enter: " );
    
    if((1 ~= length(operation)) || isempty(operation))
       fprintf( "Operation must be scalar value. Try again \r\n" );
       continue;
    end
    if((operation ~= 1) && (operation ~= 2) && (operation ~= 3))
       fprintf("Operation value is in ragne [0 3]. Try againg:\r\n");
       continue;
    else
       break; 
    end
end
input_number = 0;   % Variable holds input numbers

% Insert number loop, after some errors you can try again (ex. insert array instead of scalar value)
fprintf( "Insert number one by one (-99 is terminating): \r\n" );
while( -99 ~= array( end ) )
    input_number = input( "" );
    
    if( 1 ~= length(input_number) )
       fprintf( "You can insert numbers only one by one (scalar values). \r\n" );
       continue; 
    end
    
    array = [ array , input_number ];
end
array = array(2:end-1); % Discard terminator and initial zero

% Call calculation function
val = ASH( operation , array );

% Report result
if(1 == operation)
    
    fprintf("Arithmetic mean is: %d \r\n" , val);
    
elseif(2 == operation)
    
    fprintf("Standard deviation is: %d \r\n" , val);
    
elseif(3 == operation)
    
    fprintf("Harmonic mean is: %d \r\n" , val);
    
else
    
    error( "Operation value error.\r\n" );
            
end

function ret_val = ASH( operation , array )
%ASH Function calculates Arithmetic mean,
%standard deviation or harmonic mean
%   Input:
%       operation   -> 1, 2 or 3 for am, sd or hm respectively
%       array       -> array to perform calculations
%   Output:
%       ret_val     -> calculated value of am, sd or hm

arr_size = length(array);

% Error checking...
if(isempty(array) || 1 > arr_size)
   error( "Array must contain more then one number.\r\n" ); 
end
if(isempty(operation) || 1 ~= length(operation))
    error( "Operation must be singe value.\r\n" );
end
if((3 < operation) ||(1 > operation))
   error( "Operation range is [1 3]\r\n" ); 
end

% Calculations:
sumX = 0;
tmp = 0;
if(1 == operation)
    
    for i = 1:arr_size
        sumX = sumX + array(i);
    end
    ret_val = sumX/arr_size;
    
elseif(2 == operation)
    
    for i = 1:arr_size
        sumX = sumX + array(i);
    end
    meanX = sumX/arr_size;
    for i = 1:arr_size
       tmp = tmp + (array(i) - meanX)^2; 
    end
    ret_val = tmp/(arr_size - 1);
    
elseif(3 == operation)
    
    for i = 1:arr_size
       sumX = sumX + 1/array(i); 
    end
    ret_val = arr_size/sumX;
    
else
    
    error( "Operation value error.\r\n" );
            
end


end % ASH

Menu Driven Calculator

wavelegths=[0.7800 0.6949 0.6559 0.5843 0.5206 0.4914 0.4378];
freq=[440.0 493.9 523.2 587.3 659.3 698.5 784.0];
plot(wavelegths.^(-1),freq)
xlabel('Wavelength^{-1}')
ylabel('Frequency')

M=0.2;
G=9.8;
R=input("Enter Radius: ");
v=sqrt(G*R);
fprintf('\n Minimum Speed to avoid falling down is %f m/sec\n',v)

while(1)
z=input('Enter RD to convert Radians to Degrees or DR for Degress to Radians:','s');
if(strcmp(z,'RD'))
    r=input('Enter angle values in Radians:');
    fprintf('\nValue in Degrees:')
    d=r*180/pi
    
elseif(strcmp(z,'DR'))
    d=input('Enter angle values in Degrees:');
    fprintf('\nValue in Radians:')
    r=d*pi/180
elseif(isempty(z))
    break;
else
    fprintf('Wrong Input\n')
end
end

while(1)
n=input('Enter Name:','s');
add=input('Enter address:','s');
a=input('Enter amount of purchase: $');
z=input('Enter type of purchase(L for Laptop/D for Desktop):','s');
if(z=='L')
    if(a>=0 && a<=250)
        d=0;
    elseif(a>250 && a<=570)
        d=5;
    elseif(a>500 && a<=1000)
        d=7.5;
    elseif(a>1000)
        d=10;
    else
        fprintf('Wrong Amount\n')
        continue
    end
elseif(z=='D')
        if(a>=0 && a<=250)
        d=5;
    elseif(a>250 && a<=570)
        d=7.6;
    elseif(a>500 && a<=1000)
        d=10;
    elseif(a>1000)
        d=15;
    else
        fprintf('Wrong Amount\n')
        continue
    end
else
        fprintf('\nWrong Input\n')
        continue
end
final_amount=a-(a*d/100);
fprintf('\nName: %s',n)
fprintf('\nAddress: %s',add)
fprintf('\nNet Amount: $%f',final_amount)
k=input('\nDo you want to continue purchase:','s');
if(k~='y'&&k~='Y')
    break;
end
end
fprintf('\nYou have exit purchase screen, goodbye\n')

Mechanical Engineering Helper

Charles G