Transforming a string of letters into number based on each value equaling a number.

tban (view profile)

on 20 Sep 2017
Latest activity Commented on by Stephen Cobeldick

Stephen Cobeldick (view profile)

on 20 Sep 2017
If there are a finite amount of variables available for a string like... a,b,c,d,e....z, and each value is numbered 1,2,3,4,5....26, how can I write a short code to take in a string of letters like "bccddee" and get an output of "2+3+3+4+4+5+5".
I can define each letter as a number, but the 1st problem I encounter is braking up the string into a finite amount of values (7) it contains and then using a loop to go trough them inside the string and add them to the total.
Anyone know how to do this or atleast can point me towards the direction of how I can get within a letter string and convert it to numbers which then i can add?

José-Luis (view profile)

on 20 Sep 2017

str = 'bccddee';
result = sum(str - 'a' + 1)

1 Comment

Stephen Cobeldick

Stephen Cobeldick (view profile)

on 20 Sep 2017
+1 nice and simple. Why waste time writing anything else?

tban (view profile)

on 20 Sep 2017

Well, mystring is made out of letters and length is only used for numbers, No?

tban (view profile)

on 20 Sep 2017

using this and it works, will let you know if i have any more questions
y=char('john') y =john >> length(y) ans = 4
char needs to be used.

tban (view profile)

on 20 Sep 2017

mystring=char('word')
len=length(mystring)
w=23; o=15;r=18;d=4;
total = 0;
for i = 1:length(mystring)
if (mystring(i) == 'w')
total = total + w;
elseif (mystring(i) == 'o')
total = total + o;
elseif (mystring(i) == 'r')
total = total + r;
elseif (mystring(i) == 'd')
total = total + d;
end
end
this works

John Chilleri

John Chilleri (view profile)

on 20 Sep 2017
Glad it's working, but I don't think you need to use char:
>> length('abcdef')
ans =
6
(works in my command window).