[Tutor] Values in matrices
alan.gauld at freenet.co.uk
Sun Oct 17 16:58:09 CEST 2004
> Lets say you have a N x M matrix initially filled with zeros and
you need to
> place a value, lets say V, in some row X and column Y where V, X,
and Y are
> all values determined by user input and X and Y are less than or
equal to N
> and M respectively.
You can write a function (or create a class!):
def insertValueInMatrixAt(v, m, x, y):
m[x][y] = v
> If this is possible, could this be done many times for
> different values of V and different values of X and Y
# assume matrix created elsewhere...
value = raw_input('Value (Hit enter to stop): ')
if not value: break
value = int(value)
row = int(raw_input('Row: '))
col = int(raw_input('Column: '))
if row < N and col < M:
insertValueInMatrixAt(value, matrix, row, col)
Should do something like what you want?
You could just use the assignment directly of course but I'd actually
be tempted to move the data validation inside the function too...
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