[?] Select certain elements of sublists of a list

Questions
1

Suppose I have the following list: list = {{-1, 4, -5, 6}, {-5, - 4, 3, 1}}
Now I want to select only the negative elements of each sublist of this list.
So I would like to get the following result: {{-1,-5},{-5,-4}}.
I have tried GreaterThan[0] /@ list, but that does not work, although Max /@ list does work if one wants the maximum value of each sublist, and also Total /@ list if one needs the total of each sublist.
How do I solve this problem?
Thanks in advance for your help.
.

2

Hi Laurens,
The easiest I can think of is the following:

 list = {{-1, 4, -5, 6}, {-5, -4, 3, 1}};
    l1 = Flatten[list] // Select[# < 0 &];
    Partition[l1, 2]

{{-1, -5}, {-5, -4}}

Best Regards
Christos

3

Well, in fact you do not even need the Flatten or Partition:

Select[# < 0 &] /@ list

Cheers,

Marco

4

Thanks, Marco. That is it. Cheers, Laurens