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I'm using the online program version, I fixed what you said but got another error. "Unexpected MATLAB ERROR" "MATLAB has encountered an internal problem and needs to be closed" Also my values for k arent printing out and how can I fix the figures 1

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ktar
ktar 2018-11-27
评论： Image Analyst 2018-11-27
Error
I'm using the online program version, I tried fixing my erros from my previous question but got another error.
"Unexpected MATLAB ERROR"
"MATLAB has encountered an internal problem and needs to be closed"
Also my values for k arent printing out and how can I fix the figures 1 and 2 from having all the points looking jumbled together like that?
Code
%These commands clear the workspace and command window, in that order.
clear
clc
% Measured masses of spring 1, 2 and 3 measured in meters(m).
M1=[1e-6 .1 .2 .3 .4 .5 .6 .7 .8 .9]';
M2=[1e-6 .05 .1 .15 .2 .25 .3 .35 .4 .45]';
M3=[.05 .07 .09 .11 .13 .15 .17 .19 .21 .23]';
% Measured distances of spring 1, 2, and 3 measured in kilograms(kg).
L1=[.075 .085 .095 .105 .115 .125 .135 .145 .155 .165]';
L2=[.11 .145 .185 .225 .265 .305 .345 .375 .415 .455]';
L3=[.365 .455 .515 .585 .655 .735 .785 .885 .945 .995]';
g=(9.81);
L01=.19
L02=.08
L03=.1
x1 = ((1) ./ (M1 .* g));
y1 =((1) ./ (L1-L01));
x2 = ((1) ./ (M2 .*g));
y2 =((1) ./ (L2-L02));
x3 = ((1) ./ (M3 .* g));
y3 =((1) ./ (L3-L03));
G1= ones(length(x1), 1);
% G(:, 1) = b;
G1(:, 2) = x1;
k1 = G1 \ y1
G2 = ones(length(x2), 1);
G2(:, 2) = x2;
k2 = G2 \ y2
G3= ones(length(x3), 1);
% G(:, 1) = b;
G3(:, 2) = x3;
k3 = G3 \ y3
% uncertainties
sigma1 = sqrt(sum((y1-G1*k1).^2)./(length(x1)-2));
sigma2 = sqrt(sum((y2-G2*k2).^2)./(length(x2)-2));
sigma3 = sqrt(sum((y3-G3*k3).^2)./(length(x3)-2));
se11 = sigma1.*sqrt(1./((length(x1)+mean(x1)^2/((length(x1)-1)*std(x1)^2))));
se12 = sigma2.*sqrt(1./((length(x2)+mean(x2)^2/((length(x2)-1)*std(x2)^2))));
se13 = sigma3.*sqrt(1./((length(x3)+mean(x3)^2/((length(x3)-1)*std(x3)^2))));
se21 = sigma1.*sqrt(1./((length (x1)-1)*std(x1)^2));
se22 = sigma2.*sqrt(1./((length (x2)-1)*std(x2)^2));
se23 = sigma3.*sqrt(1./((length (x3)-1)*std(x3)^2));
% creating a line of best fit
X1 = [min(x1):1e-3:max(x1)]';
Y1 = k1(1,1) + k1(2,1).*X1;
X2 = [min(x2):1e-3:max(x2)]';
Y2 = k2(1,1) + k2(2,1).*X2;
X3 = [min(x3):1e-3:max(x3)]';
Y3 = k3(1,1) + k3(2,1).*X3;
SE1=sigma1.*sqrt(1/length(x1)+(X1-mean(x1)).^2./((length(x1)-1)*std(x1).^2));
Ci1=tinv(.975,length(x1)-2).*SE1;
SE2=sigma2.*sqrt(1/length(x2)+(X2-mean(x2)).^2./((length(x2)-1)*std(x2).^2));
Ci2=tinv(.975,length(x2)-2).*SE2;
SE3=sigma3.*sqrt(1/length(x3)+(X3-mean(x3)).^2./((length(x3)-1)*std(x3).^2));
Ci3=tinv(.975,length(x3)-2).*SE3;
figure(1)
clf
plot(x1, y1, 'ob')
hold on
% plotting the conidence intervals
plot (X1, Y1, 'g')
plot(X1,Y1+Ci1,'g--')
plot(X1,Y1-Ci1,'g--')
hold off
xlabel('$$\frac{1}{mg}$$','interpreter','latex')
ylabel('$$\frac{1}{l_1-l_0}$$', 'interpreter','latex')
title('Spring Constant')
print(figure(1), '-dpng', 'figure1')
figure(2)
clf
plot(x2, y2, 'ob')
hold on
% plotting the conidence intervals
plot (X2, Y2, 'R')
plot(X2,Y2+Ci2,'g--')
plot(X2,Y2-Ci2,'g--')
hold off
xlabel('$$\frac{1}{mg}$$','interpreter','latex')
ylabel('$$\frac{1}{l_1-l_0}$$','interpreter','latex')
title('Spring Constant')
print(figure(2), '-dpng', 'figure2')
figure(3)
clf
plot(x3, y3, 'ob')
hold on
% plotting the conidence intervals
plot (X3, Y3, 'y')
plot(X3,Y3+Ci3,'g--')
plot(X3,Y3-Ci3,'g--')
hold off
xlabel('$$\frac{1}{mg}$$','interpreter','latex')
ylabel('$$\frac{1}{l_1-l_0}$$','interpreter','latex')
title('Spring Constant')
print(figure(3), '-dpng', 'figure3')

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回答（1 个）

Image Analyst
Image Analyst 2018-11-27
编辑：Image Analyst 2018-11-27
It's a FAQ, so see The FAQ
It will tell you how to solve it. Guaranteed.
bugs.gif
  4 个评论
显示 2更早的评论
ktar
ktar 2018-11-27
Oh okay, so if I run this code on a regular downloaded program at my school it should work basically? It just an issue with there online version?
Image Analyst
Image Analyst 2018-11-27
Perhaps. Try it and see. Often hard crashes like that are very hardware dependent. Try the same program on different computers.

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