From 2c5f856e0690fb5339c47fe7e7917b8d9498f77f Mon Sep 17 00:00:00 2001
From: Abraham Xiao <q289196573@gmail.com>
Date: Mon, 22 Apr 2013 09:37:56 +0800
Subject: [PATCH] Test

---
 Exp_02_02_02.m |  7 -------
 Exp_02_02_03.m | 13 -------------
 Exp_02_02_04.m | 40 ----------------------------------------
 Exp_02_03_01.m | 11 -----------
 Exp_02_03_02.m | 11 -----------
 Exp_02_03_09.m |  8 ++++++++
 6 files changed, 8 insertions(+), 82 deletions(-)
 delete mode 100644 Exp_02_02_02.m
 delete mode 100644 Exp_02_02_03.m
 delete mode 100644 Exp_02_02_04.m
 delete mode 100644 Exp_02_03_01.m
 delete mode 100644 Exp_02_03_02.m

diff --git a/Exp_02_02_02.m b/Exp_02_02_02.m
deleted file mode 100644
index 8742092..0000000
--- a/Exp_02_02_02.m
+++ /dev/null
@@ -1,7 +0,0 @@
-% 20130418 XY511 12:25
-% AbrahamX @ NWPU
-syms x
-
-% Just some basic operations, of sym expression.
-f = (1/x^3 + 6/x^2 + 12/x + 8)^(1/3)
-g1 = simple(f)
\ No newline at end of file
diff --git a/Exp_02_02_03.m b/Exp_02_02_03.m
deleted file mode 100644
index 1cc2b7c..0000000
--- a/Exp_02_02_03.m
+++ /dev/null
@@ -1,13 +0,0 @@
-% 20130418 XY511 15:00
-% AbrahamX @ NWPU
-clear all
-A = sym('[a, b; c, d]')
-[V, D] = eig(A) %Eigenvalues and eigenvectors
-
-% find the subexpressions
-subexpr([V; D])
-who  % results are sigma and ans
-
-Dw = subexpr(D, 'w')  % Simplify D
-
-[RVD, w] = subexpr([V; D], 'w');
\ No newline at end of file
diff --git a/Exp_02_02_04.m b/Exp_02_02_04.m
deleted file mode 100644
index 56c316f..0000000
--- a/Exp_02_02_04.m
+++ /dev/null
@@ -1,40 +0,0 @@
-% 20130418 XY511 15:20
-% AbrahamX @ NWPU
-% You will find how "subs" works and,
-% a proper way to do exchange between sym and data
-% calculation.
-
-clear all
-syms a b x;
-f = a * sin(x) + b
-
-f1 = subs(f, sin(x), 'log(y)')
-class(f1)  % the new could be char string.
-
-f2 = subs(f, a, 3.11)  % the "3.11" will be turned to '3.11'
-class(f2)
-
-% Find more about Cell Array from Help
-f3 = subs(f, {a,b,x}, {2,5,sym('pi/3')})
-class(f3)
-
-format  % set to default
-format compact
-f4 = subs(f, {a,b,x}, {2,5,pi/3})  % Now it's numerical
-class(f4)
-
-f5 = subs(f, x, 0:pi/2:pi)  % Whoops, it's an array!
-class(f5)
-
-t = 0: pi/10: 2*pi
-f6 = subs(f, {a,b,x}, {2,3,t})
-plot(t, f6)
-
-% We will do two times of replacement...
-k = (0.5: 0.1: 1)'
-f7 = subs(subs(f, {a,b}, {k, 2}), x, t);  % TWO subs!
-size(f7)
-plot(t, f7)
-
-
-
diff --git a/Exp_02_03_01.m b/Exp_02_03_01.m
deleted file mode 100644
index c3ae8eb..0000000
--- a/Exp_02_03_01.m
+++ /dev/null
@@ -1,11 +0,0 @@
-% 20130418 XY511 16:00
-% AbrahamX @ NWPU
-syms t x k
-s = sin(k*t)/(k*t)
-f = (1-1/x)^(k*x);
-
-% Now let's find their limits
-Lsk = limit(s, 0)  % Limit of s when t --> 0
-Ls1 = subs(Lsk, k, 1)  % It's a great function, so to remember
-Lf = limit(f, x, inf)  % Limit of f when x --> inf
-Lf1 = vpa(subs(Lf, k, sym('-1')), 48)
\ No newline at end of file
diff --git a/Exp_02_03_02.m b/Exp_02_03_02.m
deleted file mode 100644
index 8d3228b..0000000
--- a/Exp_02_03_02.m
+++ /dev/null
@@ -1,11 +0,0 @@
-% 20130418 XY511 18:11
-% AbrahamX @ NWPU
-% The following few are aboout integral and
-% differential
-syms a t x;
-f = [a, t^3; t*cos(x), log(x)]
-df = diff(f)  % diff matrix f, x as the variable
-
-dfdt2 = diff(f, t, 2)
-
-dfdxdt = diff(diff(f, x), t)
\ No newline at end of file
diff --git a/Exp_02_03_09.m b/Exp_02_03_09.m
index e69de29..0056a41 100644
--- a/Exp_02_03_09.m
+++ b/Exp_02_03_09.m
@@ -0,0 +1,8 @@
+% 20130418 XY511 23:20
+% AbrahamX @ NWPU
+clear all
+clc
+syms x
+f1 = x * log(x)
+s1 = int(f1, x)
+s1 = simple(s1)
\ No newline at end of file