symbols =['a','b','c']
for i in range(len(symbols)):
formula= 'X~ age +' +symbols[i]+ '+'
print(formula)
This will give an output like:
X~ age+ a+
X~ age + b +
X~ age + c +
But I need the output to be :
X~ age+a
X~ age+a+b
X~ age +a +b+c
The way to do this in general is to accumulate.
text = 'starter'
for symbol in symbols:
text += symbol
text += '+'
print(text)
Because this is such a basic question I am not going to write out code that does exactly what you asked for. You should be able to figure out how to modify the above to do what you want.
I am not exactly sure what you really want to do, but what about this:
items = ""
for elem in symbols:
items = "{}{}".format(items, elem)
print "X~ " + items
( it seems that you want to concat the elements of your array for each iteration; at least that is how I read your question)
X~ aX~ abX~ abc. You need to add the +'s in somewhereYou need to keep track of the previous strings seen.
symbols =['a','b','c']
prev = "+ "
for i in symbols:
formula = 'X~ age {} {}'.format(prev,i)
print(formula)
prev += i + " + "
X~ age + a
X~ age + a + b
X~ age + a + b + c
If you don't want spaces just remove them:
symbols =['a','b','c']
prev = "+"
for i in symbols:
print('X~ age{}{}'.format(prev, i))
prev += i + "+"
X~ age+a
X~ age+a+b
X~ age+a+b+c
You can also just iterate over the symbols directly, forget about indexing.
symbols =['a','b','c']
formula='X~ age'
for i in range(len(symbols)):
formula= formula + '+' + symbols[i]
print(formula)
Assuming that the spaces in X~ age +a +b+c between +a and +b was by mistake.. else.. I dont find some pattern here and you need to loop again to print it that way..
symbols = ['a','b','c']
output = "X~ age"
for i in range(len(symbols)):
if i != len(symbols) - 1:
output = output + "+" + str(symbols[i])
print output
else:
output = "X~ age"
output = output + " +" + str(symbols[0]) + " +" + str(symbols[1]) + "+" + str(symbols[2])
print output
X~ age+a
X~ age+a+b
X~ age +a +b+c
