Removing specific characters in a string?

Im having difficulty in deleting pre-specified characters from any given string. The characters that i am tryin to eliminate are 't' 'i' 'x' 'y'

I need a lot of help creating a function that would do this for any given string.

for example

modstr('picture') should return ans = ('pcure')

or

modstr('alex') should return ans = ('ale')

I would appreciate any help or hints regarding this since i've been working on this for literally 6 hours now.

Thank You.

[Walter Roberson]

What about upper case characters?

[Olcay]

str = 'The quick brown fox jumped over the lazy dog';
unwanted = 'tixy';
str(~ismember(str, unwanted))

ans = 'The quck brown fo jumped over he laz dog'

Answer 1

[Matt Fig]

str = 'The quick brown fox jumped over the lazy dog';
strn = regexprep(str,'[tixy]','')

Answer 2

[Azzi Abdelmalek]

   s='picture'  % Example
   s(regexp(s,'[t,i,x,y]'))=[]

[Matt Fig]

This will replace commas too.

[Azzi Abdelmalek]

 s(regexp(s,'[tixy]'))=[]

[Paul Safier]

Great solution, thanks.

Answer 3

[Walter Roberson]

Hint #1: ismember()

Hint #2: logical indexing

[Nikhil Bhatia]

im sorry but i have only been working with matlab for the past 2 days ... could you please explain a little further?

[Walter Roberson]

Consider

s == 't' | s == 'i' | s == 'x' | s == 'y'