Cannot set axes properties

I am trying to set axes properties.

clc;

length = 10;
k = linspace(1, length, length);

m = 100;
p = 0.95;

temp1 = - (k.^(-1));
temp2 = log(1-p);
temp3 = temp2.*temp1;
temp4 = exp(temp3);

y = (1+temp4).*(0.5*m);
err = (temp4-1).*(0.5*m);

pointEstimator = (1+(k.^(-1))).*m;

width = 12;
height = 10;
AxesLineWidth = 0.75;
FotSize = 8;
LineWidth = 1.5;
MarkerSize = 6;

pos = get(gcf, 'Position');
set(gcf, 'Position', [pos(1) pos(2) width*100 height*100]);

errorbar(k, y, err,'LineWidth',LineWidth,'LineStyle','none','Color',[153,142,195]/255); hold on;
plot(k, pointEstimator,'o','MarkerEdgeColor',[241,163,64]/255,'MarkerFaceColor',[241,163,64]/255,'MarkerSize',MarkerSize); hold on;

set(gca, 'LineWidth',AxesLineWidth,'FontSize',15,'TickLabelInterpreter','latex');

xlim([0 length+0.5]);
max = 1 / (1-p) * m;
ymax = max * 1.05;
ylim([0 ymax]);
xlabel('$$ k $$','Interpreter','latex','FontSize',15);
ylabel('Estimated $$ N $$','Interpreter','latex','FontSize',15);

yticks([m 5*m 10*m 15*m 20*m 25*m]);
yticklabels({'$$m$$', '$$5m$$', '$$10m$$', '$$15m$$', '$$20m$$', '$$25m$$'});
grid on;
grid minor;

legend('95% Confidence Intervals','Point Estimators');

However, an error occurs.

Error using set
Conversion to double from struct is not possible.

Error in plot1 (line 32)
set(gca, 'LineWidth',AxesLineWidth,'FontSize',15,'TickLabelInterpreter','latex');

Any help or suggestions will be appreciated!

[Star Strider]

Your code runs for me without error in R2018a.

Also, length is a core MATLAB function you may want to use later, so rename it to something else. (Naming a variable the same as a MATLAB function is known as ‘overshadowing’, and is best avoided.) I chose to rename it ‘len’:

len = 10;
k = linspace(1, len, len);
...
xlim([0 len+0.5]);

[dpb]

Not same code as created the error; this was in some function plot1 by the error message text.

The above code works fine.

Looks like you've somehow during debugging/testing gotten a dot (period) and subsequent field name added to the AxesLineWidth variable in the actual code that silently turned it into a struct. Do a

clear Axes*

and try again...or if you don't have much data in the workspace that would be difficult to recreate, just

clear

to start over from clean slate.