extract letters in country name

The file contains a 10-by-1 structure array called S. The 10 elements in S correspond to 10 different countries, whose name, GDP per capita (in USD), population and land area (in square kilometers) are stored in different structure fields. For example, S(1) leads to the output

ans =
             struct with fields:
CountryName: ’China’ GDP: 8643
Population: 1.4095e+09 Area: 9326410

In one line of code, extract the first 3 letters of the name of the 4th country stored in S and save it to a string called country4. I don't know how to do this. SO i have an idea of something like S(4,1) but there where would i include the (1:3) to extract just the three letters? I just need guidance i really want to learn this no answers Thanks.

[Steven Lord]

Take a look at this documentation page.

Answer 1

[Image Analyst]

It's not S(4,1), it's S(4) and then you need the field name, CountryName, and it's the CountryName that takes the index 1:3. Try it. Experiment around. If you still need help with your homework, write back.

[Ileana Gonzalez]

Actually jk I got it!! thanks!!