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2
votes
2answers
173 views

How to select the first “lowest” (first valley) number in a list?

I would to select the first valley of the list of coordinates below. It should be {3, 1}. ...
1
vote
2answers
65 views

Select record when third column matches certain criterion

I've a table with 3 columns. The table looks like this: ...
18
votes
2answers
360 views

How to make a curve selectable from a scaned image and convert it to a list of coordinates

I have a scanned image (binary-ized): Is there any way to reduce one of these curved lines (full or dotted) to a series of its coordinates (e.g., sampling interval of 0.01 on x-axis)? I've read ...
2
votes
1answer
59 views

How to use Select to exclude a single element which I can control? [duplicate]

I have code which inserts an expression into lists that I need to remove. I can insert anything I want, a string, variable, or number, into the lists. Suppose I insert the number 13 as my blacklisted ...
5
votes
6answers
837 views

How to select all elements above the main diagonal of matrix?

How to select all elements above the main diagonal of matrix? I need to create a list of them.
4
votes
2answers
100 views

Using Except with strings

Suppose that I have the following sample list, called list: list = {"bBb", "aAa", "aaa"}; Now suppose I want to select the ...
3
votes
2answers
103 views

Select elements of a Matrix that are the same (or have certain relationship) and return their position and the element itself

I have a matrix and I want to pick the elements that are the same and return their positions and their values. It seems easy to me, but all I know is how to pick elements that satisfy certain ...
1
vote
3answers
168 views

Matlab-style Find in Mathematica? Value list and Boolean List, how to select values according to the boolean list?

I want to select elements with the true value (Indices list) in the corresponding point to the value list (MCS). Is there anything like Matlab-style Find to get the indices of true values in the ...