[R] distance matrix

[WCD]

Hello, I want do get the point to point distance matrix.
Suppose, I have a data frame where the first column is X and second column
is Y coordinate of points.
I define a function dst(x1,y1,x2,y2) to claculate distance between two
points. But I don't know how to tell R to calculate dst for every two points
and create a matrix of these distances.

Can you give me a little guidance, please? I am quite new to R and
programming.
Thanks for every advice. Filip Kral.

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