How to fix this weird plot behaviour?

Hello. I have problem with dissapearin function using plot. It looks like this:

However if I change position of the view it disapears:

It is the case of only that function. Does somebody know, why?

figure(1)
    hold on
        ylim([678, 685])
        plot(vysledkyM, 'r');
        plot(vysledkyU, 'b');
        plot(vysledkyS, 'g');
        legend('death penalty','stupnova', 'umerna')
    hold off

EDIT: Clarification of the question

Answer 1

[Adrian Brand]

figure(1)
hold all;
ylim([678, 685]);
plot(vysledkyM, 'r');
plot(vysledkyU, 'b');
plot(vysledkyS, 'g');
legend('death penalty','stupnova', 'umerna');
hold off;

This did the trick.

Answer 2

[David Goodmanson]

Hi Adrian,

figure(1)
plot(vysledkyM, 'r');
ylim([678, 685])
hold on
plot(vysledkyU, 'b');
plot(vysledkyS, 'g');
legend('death penalty','stupnova', 'umerna')
hold off

Matlab only buys into 'hold on' after the first trace is plotted. (Same with ylim, evidentty).

[Adrian Brand]

Thank you for the tip about hold on. But sadly it still doesn't work as you can see.