清空筛选条件
清空筛选条件

Write a function that will receive a character and a positive integer n. It will create and return a cell array with strings of increasing lengths, from 1 to the integer n. It will build the strings with successive characters

2 次查看（过去 30 天）
Raman Sah
Raman Sah 2017-9-27
评论： Akira Agata 2017-10-2
Write a function buildstr that will receive a character and a positive integer n. It will create and return a cell array with strings of increasing lengths, from 1 to the integer n. It will build the strings with successive characters in the ASCII encoding. >> buildstr('a',4) ans = 'a' 'ab' 'abc' 'abcd'

请先登录，再回答此问题。

回答（2 个）

Eeshan Mitra
Eeshan Mitra 2017-9-29
You could use the MATLAB functions "double" and "char" for this purpose.
Assuming you have already gotten the function to read the inputs, lets say buildstr('a',3), then for the character 'a':
>> double('a')
ans =
97
would yield the ASCII code for the character. You can write your logic and subsequently use the function "char" to convert an ASCII code back to a character. For example:
>> char(double('b') + 1)
ans =
'c'
Of course in your case, you will need to compensate for edge-cases, like what would you expect when you enter:
buildstr('y',5)
Akira Agata
Akira Agata 2017-9-29
The function becomes like this. Please note that the following sample script is very basic one. So, some exception handling process should be added for practical use.
function output = buildstr(str, num)
list = 'abcdefghijklmnopqrstuvwxyz';
idx = strfind(list,str);
output = arrayfun(@(x) list(idx:idx+x-1), [1:num],'UniformOutput',false);
end
  4 个评论
显示 2更早的评论
Stephen23
Stephen23 2017-10-1
@Raman Sah: of course you can do this without arrayfun. Anything that can be done with arrayfun or cellfun can also be done with a loop.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Startup and Shutdown 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by