Error when using the placelabels function - Unrecognized function or variable

I'm trying to use the placelabels function with my plotting here (I inherited this code, shown below). I get the error "placelabels" is not recognized. How can I fix this? I'm using Matlab 2022b.

figure(1);
set(gcf, 'Units', 'Inches', 'Position', [fig_xpos, fig_ypos, fig_width, fig_height], ...
    'PaperUnits', 'Inches', 'PaperSize', [fig_width, fig_height]);
subplot(2,1,1);
plot(t, x_new(1,:),'b','LineWidth',lw);hold on;
plot(t, x_kop(1,:),'r--','LineWidth',lw);hold on;
axis tight;
placelabels('','','$x_1$', fs, gs);

Answer 1

[Image Analyst]

Ask the person you inherited it from. He or she probably wrote a custom function that they forgot to give you. If you can't contact him or her, then just delete the line or comment it out.