How to rotate a map?

I have SST data in .nc format and I proceeded with this script

ncinfo('filename')
ncdisp('filename')
variable_name=ncread('filenema','variable_name')
[laty, lonx] = meshgrid (lat,lon)
mean_sst = mean(analysed_sst,3) 
imagesc(lon,lat,mean_sst)

and I got this result but the map of South Korea is rotated, what can be the problem?

[Dyuman Joshi]

In the high-level version of the imagesc(), the direction of y-axis is reversed (along with some other changes), as can observed from the figure as well.

Another method to revert it back, aside from Chunru's answer below, is change the y-direction property to normal -

ax = gca;
ax.YDir = 'normal';

Answer 1

[Chunru]

It is upside down. Add the following:

axis xy

[HADJ MOHAMMED]

where I add it Please? because it didn't change

[Dyuman Joshi]

Add it after the imagesc() call