# how to import a matlab 3 dimensional array into mathematica

I have created a three dimensional array "data" in matlab by using the following commands :

data=100*ones(100,100,100);
data(10:20,10:20,10:20)=20;
data(80:90,80:90,80:90)=80;
save data;


As you can see, most of elements in "data" have the value 100, but there are two zones located at two corners with value 20 and 80 respectively. Then I created a graph to show these two zones. Using the "isosurface" function in matlab, I get the picture below

Now I want to import the "data" into mma, and plot a similar graph in mma. I tried the following commands in mma but got some errors :

what's the mistake ? how should i do?
thanks for reviewing the navie quetions : )

• Have you seen this: mathematica.stackexchange.com/a/24478/5 – rm -rf Oct 27 '15 at 8:50
• Please show precisely what you tried so far. I don't see any problems when importing a mat file generated this way. – Szabolcs Oct 27 '15 at 10:43
• (Just use Import) – Szabolcs Oct 27 '15 at 10:51
• It's a good idea to look at the structure of the expression that Import returns. What I get is a list containing a path (string) and a 3D array. I need to take the second element of the list to get the 3D array. From the error message in your post it looks like you have a list containing a single 3D array. Take the first element of the list. – Szabolcs Oct 28 '15 at 10:56

Dimensions[a]

ListPlot3D[Flatten[a, 1]]