I want to program a code in MATHEMATICA in order to calculate some values in different iteration. For example, assume this list:
list={1,2,3,4,5}
Now assume that the function is :
f1=Function[u,3+u][x]
I want to use a Do loop to orderly put each integer from the list into f1 function and Do loop uses 5 iteration ({i,1,5}) and gives 5 answers using the values in the list.
For this example, The results will be :
4
5
6
7
8
I wonder if anyone could help me with this problem.
I think you want to define f1 as
f1 = Function[u, 3 + u]
since the form you started with would have created the function and then applied it to x.
The easiest way to do what you want is to use Map:
Map[f1, list]
which has an equivalent syntax
f1 /@ list
If you really must use a Do loop, you would do it as follows:
Module[{result = {}}, Do[AppendTo[result, f1[i]], {i, list}]; result]
This is a lot more work. The Module that wraps the Do loop creates a result symbol to hold your output. The Do loop iterates over the elements of list, appending the computation of f1 on each element to the result output.
Do[f1[list[[x]]],{x,5}]and that you got nothing as output. Try telling it toPrintthe output by wrapping thef1[list[[x]]]with Print[]. The answer that Christopher Cole provided usingMapis clearly a better way to solve this. $\endgroup$ – Andy Mobley Mar 30 '14 at 15:46