Help on Basic Matrices

Hi, I'm new to Matlab and I know its Help Guide is big and accurate. However I couldn't find the answer to my question,probably because it's pretty straightforward. I want to create the following matrix:

 a = [8 -180 65789 2098; 0.15 202.9 -0.64 -100.19]

But then it just shows :

 a =

   1.0e+04 *

    0.0008   -0.0180    6.5789    0.2098
    0.0000    0.0203   -0.0001   -0.0100

I'd like to know what the unwanted text is ''1.0e+04'' and also know why the matrix has such different numbers. How do i fix this and what is the source of this problem? Then i try using the following functions: 1. int8(a) 2. int16(a) 3. uint8(a) Could you explain their use,please?

Answer 1

[Youssef Khmou]

the representation is only related to the type of formatting the answer, try :

 >>format bank
 >>a

type doc format for more options, to reset to the default format, type :

 >>format

[Walter Roberson]

I suggest

format long g

[Youssef Khmou]

Right! it is described as the best for floating point

[tzenh karetzh]

and could you tell me why the functions int8 uint8 and int16 are rounding the decimal number for example :

 int16(202.9) = 203 and
 int8(-0.64) = -1 ?

[Youssef Khmou]

numbers with digits after the decimal points are stored as double , intX converts the numbers to the range [-(2^(X)/2 : 2^(X)/2]