How to save variables in workspace to be used after running the code multiple times?

Question

Stevie Rauch 2020-4-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/518807-how-to-save-variables-in-workspace-to-be-used-after-running-the-code-multiple-times

评论： Stevie Rauch 2020-4-18

A = input('Pick an angle 15, 30, 45, or 60      angle = ');
if A ~= [15 30 45 60]
    error('Error. angle must be  15, 30, 45, or 60 degrees     ');
end
b = 4;
c = 4;
a = sidea(b,c,A);
B = asind((b*sind(A))/a);
C = 180 - B - A;
H = C;
E = 180 - C - H;
e = 4;
f = a;
g = 4;
h = 4;
F = asind((f*sind(E))/e);
D = 180 - E - F;
d = sided(e, f, D);
i = d;
G = asind((g*sind(H))/h);
I = 180 - G - H;
%% Variables/Calculations
% Method of Joints
P = 1;
% Joint I
Fig = P / sind(I);
Fei = Fig * cosd(I);
% Joint G
Fge = (Fig*sind(I))/(sind(F));
Fgb = (Fge*cosd(F)+Fig*cosd(I));
% Joint B
Fba = (Fgb)/(cosd(A)+(sind(A)*cotd(C)));
Fbe = (Fba*sind(A))/sind(C);
% Joint E
Fea = Fei - (Fge*cosd(F))+(Fbe*cosd(D));
%% Solving for P
if A == 15
    Fea = -Fea;
    if Fba > Fge
        T = ((8*(trig(A, C, F, I))));
    elseif Fba < Fge
        T = 6 * sind(F);
    end
end
if A == 30 
    Fea = -Fea;
    if Fba > Fge
        Z = ((8*(trig(A, C, F, I))));
    elseif Fba < Fge
        Z = 6 * sind(F);
    end
end
if A == 45 
    Fea = -Fea;
    if Fba > Fbe
        P = (8*(trig(A, C, F, I)));
    elseif Fbe > Fba
        P = ((6*(trig(A, C, F, I)*(sind(C)/sind(A)))));
    end
end
if A == 60 
    R = ((6*(trig(A, C, F, I))));
end
%% User Defined Functions
function [a] = sidea(b, c, A)
[a] = sqrt(b^2 + c^2 - (2*b*c*cosd(A)));
end
function [d] = sided(e, f, D)
[d] = sqrt(e^2 + f^2 - (2*e*f*cosd(D)));
end
function [comp] = trig(A, C, F, I)
[comp] = (cosd(A)+sind(A)*cotd(C))/(cotd(F)+cotd(I));
end

I am trying to run this code four times for four different angles, [15, 30, 45, 60]. I want it to save variables across each run so at the end, i can use them to plot. My problem is, no matter what i do, the variables seem to be overided. I tried to saved the variable as it's own file using save command but I could not run the code because i was trying to load variables that were not yet saved. I tried to initialize these variables and save them as 0 so that i could run the code but then the variables would be overun. If anyone has any idea it would be a great help.

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Answer 1

Walter Roberson 2020-4-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/518807-how-to-save-variables-in-workspace-to-be-used-after-running-the-code-multiple-times#answer_426719

编辑：Walter Roberson 2020-4-18

在 MATLAB Online 中打开

T = nan;
Z = nan;
P = nan;
R = nan;
for trynum = 1 : 4
    A = input('Pick an angle 15, 30, 45, or 60      angle = ');
    if A ~= [15 30 45 60]
        error('Error. angle must be  15, 30, 45, or 60 degrees     ');
    end
    
    b = 4;
    c = 4;
    a = sidea(b,c,A);
    B = asind((b*sind(A))/a);
    C = 180 - B - A;
    H = C;
    E = 180 - C - H;
    e = 4;
    f = a;
    g = 4;
    h = 4;
    F = asind((f*sind(E))/e);
    D = 180 - E - F;
    d = sided(e, f, D);
    i = d;
    G = asind((g*sind(H))/h);
    I = 180 - G - H;
    
    
    
    %% Variables/Calculations
    % Method of Joints
    P = 1;
    % Joint I
    Fig = P / sind(I);
    Fei = Fig * cosd(I);
    
    % Joint G
    Fge = (Fig*sind(I))/(sind(F));
    Fgb = (Fge*cosd(F)+Fig*cosd(I));
    
    % Joint B
    Fba = (Fgb)/(cosd(A)+(sind(A)*cotd(C)));
    Fbe = (Fba*sind(A))/sind(C);
    
    % Joint E
    Fea = Fei - (Fge*cosd(F))+(Fbe*cosd(D));
    
    %% Solving for P
    
    if A == 15
        Fea = -Fea;
        if Fba > Fge
            T = ((8*(trig(A, C, F, I))));
        elseif Fba < Fge
            T = 6 * sind(F);
        end
    end
    
    if A == 30 
        Fea = -Fea;
        if Fba > Fge
            Z = ((8*(trig(A, C, F, I))));
        elseif Fba < Fge
            Z = 6 * sind(F);
        end
    end
    
    if A == 45 
        Fea = -Fea;
        if Fba > Fbe
            P = (8*(trig(A, C, F, I)));
        elseif Fbe > Fba
            P = ((6*(trig(A, C, F, I)*(sind(C)/sind(A)))));
        end
    end
    
    if A == 60 
        R = ((6*(trig(A, C, F, I))));
    end
end
if isnan(T)
    error('You never selected 15')
end
if isnan(Z)
    error('You never selected 30')
end
if isnan(P)
    error('You never selected 45')
end
if isnan(R)
    error('You never selected 60')
end
plot([15 30 45 60], [T, Z, P, R])
%% User Defined Functions
function [a] = sidea(b, c, A)
[a] = sqrt(b^2 + c^2 - (2*b*c*cosd(A)));
end
function [d] = sided(e, f, D)
[d] = sqrt(e^2 + f^2 - (2*e*f*cosd(D)));
end
function [comp] = trig(A, C, F, I)
[comp] = (cosd(A)+sind(A)*cotd(C))/(cotd(F)+cotd(I));
end

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Stevie Rauch 2020-4-18

在 MATLAB Online 中打开

%% Clean Up Section
clc;                            % clears command window
close all;                      % closes any previously opened figures
clear;                          % clears variables in workspace
%% Input and Variables
T = nan;
Q = nan;
Z = nan;
R = nan; 
kk = 1
for trynum = 1 : 4
        
        A(kk) = input('Pick an angle 15, 30, 45, or 60      angle = ');
        if A(kk) ~= ([15 30 45 60])
            error('angle must be  15, 30, 45, or 60 degrees     ');
        end
        
        b = 4;
        c = 4;
        a = sidea(b,c,A);
        B = asind((b.*sind(A))/a);
        C = 180 - B - A;
        H = C;
        E = 180 - C - H;
        e = 4;
        f = a;
        g = 4;
        h = 4;
        F = asind((f.*sind(E))./e);
        D = 180 - E - F;
        d = sided(e, f, D);
        i = d;
        G = asind((g.*sind(H))./h);
        I = 180 - G - H;
        
        
        
        %% Variables/Calculations
        % Method of Joints
        P = 1;
        % Joint I
        Fig = P ./ sind(I);
        Fei = Fig .* cosd(I);
        
        % Joint G
        Fge = (Fig.*sind(I))./(sind(F));
        Fgb = (Fge.*cosd(F)+Fig.*cosd(I));
        
        % Joint B
        Fba = (Fgb)./(cosd(A)+(sind(A).*cotd(C)));
        Fbe = (Fba.*sind(A))./sind(C);
        
        % Joint E
        Fea = Fei - (Fge.*cosd(F))+(Fbe.*cosd(D));
        
        %% Solving for P
        
        if A == 15
            Fea = -Fea;
            if Fba > Fge
                T = ((8*(trig(A, C, F, I))));
            elseif Fba < Fge
                T = 6 * sind(F);
            end
        end
        
        if A == 30
            Fea = -Fea;
            if Fba > Fge
                Z = ((8*(trig(A, C, F, I))));
            elseif Fba < Fge
                Z = 6 * sind(F);
            end
        end
        
        if A == 45
            Fea = -Fea;
            if Fba > Fbe
                Q = (8*(trig(A, C, F, I)));
            elseif Fbe > Fba
                Q = ((6*(trig(A, C, F, I).*(sind(C)/sind(A)))));
            end
        end
        
        if A == 60
            R = ((6*(trig(A, C, F, I))));
        end
        kk = kk + 1;
end
 
    if isnan(T)
        error('You never selected 15')
    end
    if isnan(Z)
        error('You never selected 30')
    end
    if isnan(P)
        error('You never selected 45')
    end
    if isnan(R)
        error('You never selected 60')
    end
    
    plot([15 30 45 60], [T, Z, P, R])
    
    
    %% User Defined Functions
    
function [a] = sidea(b, c, A)
[a] = sqrt(b^2 + c^2 - (2*b*c*cosd(A)));
end
    
function [d] = sided(e, f, D)
[d] = sqrt(e.^2 + f.^2 - (2*e.*f.*cosd(D)));
end
    
function [comp] = trig(A, C, F, I)
[comp] = (cosd(A)+sind(A)*cotd(C))/(cotd(F)+cotd(I));
end
    
    

So trynum did work, but I am now trying to create array with all the data that changes so the user can see how variables change when dependent on other variables. When trying to run this code before creating arrays it ran perfectly and saved all the variables across runs, the only problem was that you were only able to see the results for the last user input, not what was input in between. So now I dont get why that could be, all im trying to do is make sure the intermediate data can be seen?

Walter Roberson 2020-4-18

exactly which variables need to be recorded and at which points? For example do you need to record Fea before and after Fea = -Fea?

Stevie Rauch 2020-4-18

I think im okay now. I built a structure within the for loop to display the most important values. Thank you for the help though.

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How to save variables in workspace to be used after running the code multiple times?

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How to save variables in workspace to be used after running the code multiple times?

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