contour函数报错怎么办？

panphp

clear
6 h, `; F! K( x1 k; @( R6 [ncinfo('rhum.mon.mean.nc');
y_len=60;
t_len=854;
7 L6 }( T, ?$ Ez_index=7
x_index=120
x = ncread('rhum.mon.mean.nc','lon');%x
z = ncread('rhum.mon.mean.nc', 'level');%z
y = ncread('rhum.mon.mean.nc', 'lat');%y
t = ncread('rhum.mon.mean.nc', 'time');%t
! \7 N; s# v) l* H2 t0 r2 frhum = ncread('rhum.mon.mean.nc', 'rhum');
4 {# }: a* j3 j/ i7 J4 _figure; hold on;
, l/ t/ S5 n* V- E! `) Z9 Adraw_y = 30:1:60;
0 A" q" `1 _- s" \; ~. edraw_t = 1:1:854;
f = rhum(x_index,draw_y,z_index,draw_t)
6 Y3 k; }* |- i( a/ I5 R+ E# Rfor ii = 1:1:numel(draw_y)
, |2 F( {& Y' q; q% f0 d    for jj = 1:1:numel(draw_t)
9 ?$ `1 O7 ]0 X" J4 V6 u' ]        Z(jj,z_index,ii,x_index) = f(x_index,draw_y(ii),z_index,draw_t(jj));
/ _9 [: u2 T" v* i) R) \    end
end
[draw_y,draw_t] = meshgrid(draw_y,draw_t);
contour (draw_y,draw_t,Z);
: A" c- ^. t6 E+ _. g5 _
错误显示 试图访问 f(120,30,7,1)；由于 size(f)=[1,31,1,854]，索引超出范围。
改了循环里面之后会显示 试图访问 f(1,32,1,1)；由于 size(f)=[1,31,1,854]，索引超出范围。
请教大神，非常感谢！
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Sky_wm

可能参数超出了范围