# : Visualizing The Gender Gap In College Degrees

Hello

Just completed the gender gap data visualization project, had to look at the solution notebook and other posts which i generally avoid doing early on.

Difficulty understanding converting each range for the 6 row, 3 column matrix,

What is logic using cat_index = int((sp-1)/3) to convert range (1,16,3) for column 2 in matrix

Same question : using cat_index = int((sp-2)/3) for sp in range(2,20,3): for col 3 in the matrix

My Code:

``````# column2:create loop from 1 to 16, increments of 3
for sp in range(1,16,3):
# for each sp increment in range divide by 3
# to get the category index
cat_index = int((sp-1)/3)
# map each category item into the 6 row, 3 col plot
#subplot of 6 rows, 3 columns

# column3: loop 2,20, sp increments of 3
for sp in range(2,20,3):
# set each sp range increment to category index
cat_index = int((sp-2)/3)
# map each category index into 6,3 subplot

``````

What I expected to happen:

What actually happened:

``````Replace this line with the output/error
``````