Hi,

Emerged me a doubt to perform some operations with dense matrices and

sparse matrices.

I’m doing a few methods to check whether an array is dense or not and

use a hash of hashes, for then do methods of addition and subtraction

between dense and sparse matrices.

Will also have to wear the coerce to do the conversion in the matrix

when performing the operation between the values of arrays.

We have in this code that does the calculation.

An example of sparse arrays in Ruby

Thanks.

matriz1 = ([[5,0,3],[4,5,8],[7,8,9]])

hsh = Hash.new

i=0

while i < 3

j=0

while j < 3

if (matriz1[i][j] != 0)

puts matriz1[i][j]

hsh["#{i}"] = Hash.new

hsh["#{i}"]["#{j}"] = matriz1[i][j]

else

end

j += 1

end

i += 1

end

hsh.each {|key, value|

```
value.each{ |k, v|
puts key
puts k
puts v
puts "[#{key}, #{k}] = #{v}"}
```

}