帮帮看看程序，我想用希腊字母替代英语字母，一直出现matlab error missing variable
clc;clear all;I1=fopen('english.txt','r');I2=fread(I1,'char');fclose(I1);switch findstr(I2,'A''B''E''H''I''K''M''N''O''P''T''X''Z''o''p''x') case 'A' strrep(I2,'A','Α'); case 'B' strrep(I2,'B','Β'); case 'Ε' strrep(I2,'E','Ε'); case 'Η' strrep(I2,'H','Η...