% diary is not diary
while(1) , x=1; end
a=1
a =
1
format compact
a=1
a =
1
more off
2+3
ans =
5
2-3
ans =
-1
2*3
ans =
6
2 3
2 3
{Error: Unexpected MATLAB expression.
}
2/3
ans =
0.6667
2^3
ans =
8
1.5/.5
ans =
3
1.0546e-34
ans =
1.0546e-34
0.0000000000000000000000000000000000000000010546
ans =
1.0546e-42
0.000000000000000000000000000000000
ans =
0
10546
ans =
10546
1.0546e-34^2
ans =
1.1122e-68
1/0
ans =
Inf
0/0
ans =
NaN
1.0546e-34^10
ans =
0
1.0546e-34^(-10)
ans =
Inf
(1/3)+(1/3)+(1/3)-1
ans =
0
(1/3)+(1/3)+(1/3)+(1/3)+(1/3)+(1/3)-2
ans =
-2.2204e-16
(1000/3)+(1000/3)+(1000/3)+(1000/3)+(1000/3)+(1000/3)-2000
ans =
-2.2737e-13
eps(1)
ans =
2.2204e-16
eps(1000)
ans =
1.1369e-13
sin(30)
ans =
-0.9880
sin(pi/6)
ans =
0.5000
sind(30)
ans =
0.5000
pi
ans =
3.1416
sin(10*pi)
ans =
-1.2246e-15
sin(100000000000000000000*pi)
ans =
-0.3941
i^2
ans =
-1
(1+i)^2
ans =
0.0000 + 2.0000i
i=1
i =
1
i
i =
1
i^2
ans =
1
who
Your variables are:
a ans i x
clear i
i
ans =
0.0000 + 1.0000i
j
ans =
0.0000 + 1.0000i
(1+i)*(1-i)
ans =
2
sin(1+i)*sin(1-i)
ans =
2.0892
2+3*4
ans =
14
2+(3/4)
ans =
2.7500
2+(3*4)
ans =
14
(2+3)*4
ans =
20
12/2*3
ans =
18
% highest: ^
% next: * and /
% lowest: + and -
publish('hw1.m','pdf')
{Error using publish (line 98)
Cannot find "hw1.m".}
publish('hw1.m','pdf')
ans =
\\print2\dommelen\My Documents\MATLAB\html\hw1.pdf
uiopen('Z:\My Documents\MATLAB\hw1.m',1)
hw1.m
{Undefined variable "hw1" or class "hw1.m".}
hw1
ans =
3.5000
ans =
2
publish('hw1.m','pdf')
{Error using publish (line 144)
The output file "\\print2\dommelen\My
Documents\MATLAB\html\hw1.pdf" is not writable.}
publish('hw1.m','pdf')
ans =
\\print2\dommelen\My Documents\MATLAB\html\hw1.pdf
help error
error Display message and abort function.
error(MSGID, ERRMSG, V1, V2, ...) displays a descriptive message
ERRMSG when the currently-running program encounters an error
condition. Depending on how the program code responds to the error,
MATLAB then either enters a catch block to handle the error condition,
or exits the program.
MSGID is a unique message identifier string that MATLAB attaches to the
error message to better identify the source of the error (see MESSAGE
IDENTIFIERS, below).
ERRMSG is a character string that informs the user about the cause of
the error and can also suggest how to correct the faulty condition.
The ERRMSG string may include predefined escape sequences, such as
\n for newline, and conversion specifiers, such as %d for a decimal
number.
Inputs V1, V2, etc. represent values or substrings that are to
replace conversion specifiers used in the ERRMSG string. The format
is the same as that used with the SPRINTF function.
error(ERRMSG, V1, V2, ...) reports an error without including a
message identifier in the error report.
error(ERRMSG) is the same as the above syntax, except that the ERRMSG
string contains no conversion specifiers, no escape sequences, and no
substitution value (V1, V2, ...) arguments.
error(MSGSTRUCT) reports the error using fields stored in the scalar
structure MSGSTRUCT. This structure can contain these fields:
message - Error message string
identifier - See MESSAGE IDENTIFIERS, below
stack - Struct similar to the output of the DBSTACK function
If MSGSTRUCT is an empty structure, no action is taken and error
returns without exiting the program. If you do not specify the
stack, the error function determines it from the current file and line.
MESSAGE IDENTIFIERS
A message identifier is a string of the form
[component:]component:mnemonic
that enables MATLAB to identify with a specific error. The string
consists of one or more COMPONENT fields followed by a single
MNEMONIC field. All fields are separated by colons. Here is an
example identifier that has 2 components and 1 mnemonic.
'myToolbox:myFunction:fileNotFound'
The COMPONENT and MNEMONIC fields must begin with an
upper or lowercase letter which is then followed by alphanumeric
or underscore characters.
The COMPONENT field specifies a broad category under which
various errors can be generated. The MNEMONIC field is a string
normally used as a tag related to the particular message.
From the command line, you can obtain the message identifier for an
error that has been issued using the MException.last function.
See also MException, MException/throw, try, catch, sprintf, dbstop,
errordlg, warning, disp, dbstack.
Reference page for error
help erf
erf Error function.
Y = erf(X) is the error function for each element of X. X must be
real. The error function is defined as:
erf(x) = 2/sqrt(pi) * integral from 0 to x of exp(-t^2) dt.
See also erfc, erfcx, erfinv, erfcinv.
Reference page for erf
Other functions named erf
doc erf
who
Your variables are:
a ans x y
clear
who
x=3
x =
3
x
x =
3
who x
Your variables are:
x
who
Your variables are:
x
whos
Name Size Bytes Class Attributes
x 1x1 8 double
x=x+7
x =
10
x
x =
10
x==x+7
ans =
0
x==x
ans =
1
x=x+x
x =
20
x=x+x
x =
40
x=x+x
x =
80
x=1
x =
1
y=2
y =
2
x=y;
y=x;
x=1
x =
1
y
y =
2
temp=x
temp =
1
x=y
x =
2
y=temp
y =
1
pi
ans =
3.1416
pi=3.2
pi =
3.2000
clear pi