can't add axis labels

hey, could someone quickly help me to add labels to my plot? i've tried but something has gone wrong (something simple i'm sure)

this is the code i've used just at the end to do my plots

plot(50:1000,z_1rec,'color','r'), hold on plot(50:1000,z_1nogaprec,'color','b'), xlabel Frequency (Hz), ylabel Surface Impedance

Answer 1

[Mohsen Davarynejad]

xlabel('Frequency (Hz)');
ylabel('Surface Impedance');

Answer 2

[Robert Cumming]

plot ( magic(100) )
xlabel ( 'my xlabel' )
ylabel ( 'my ylabel' )

Answer 3

[Tom]

thanks