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Scilab on Cloud facilitates execution of the codes for particular example(s) online. The results can then be verified with the solved example(s) from the textbook. It is also possible to change the values of the variables and in fact, the code itself, and execute it.
To open the editor from the console, click on the first icon in the toolbar or on Applications > SciNotes in the menu bar. The editor opens with a default file named “ Untitled 1 “.
Typing in the editor is like as in any word processor. In the text editor, opening and closing parentheses, end loops, function and test commands are added automatically. However, these features can be disabled in Options > Auto-completion on menu, in clicking on the two below entries enabled by default:
• (,[,…
• if,function,…
While in principle each instruction should be entered on a separate line, it is possible to type multiple statements on a same line separating each statement with a semicolon “ ; “. A space at the start of the line called indentation is automatic when a loop or a test is started.
Integers are whole numbers represented as binary values. 1 if variable is a integer type, otherwise 0.
Example:
x=uint16(1:10);
inttype(x)
Floating point numbers are at the core of numerical computations, as opposed to symbolic computations. The limited precision of floating point
numbers have a fundamental importance in Scilab.
Example:
m = grand(3,5,"uin",1,9) .* 10.^grand(3,5,"uin",-16,1)
clean(m)
clean(m, 1e-7)
A string is any finite sequence of characters. The characters can be either letters, numbers, symbols or punctuation marks.
Example:
Arithmetic operators are used to perform arithmetic operations on variables and data.
Examples:
A relational operator is used to check the relationship between two operands.
Examples:
In order to perform logical operations in Scilab we can use AND, OR and NOT operators. The logical operators are mostly used within conditional loops like: if, while, etc.
Examples:
The equal sign = is used to denote the assignment of value(s) to variable(s). The syntax can be : a=expr where a is a variable name and expr a scilab expression which evaluates to a single result; [a,b,...]=
Example:
A sequence of two consecutive slashes // out of a string definition marks the beginning of a comment. The slashes as well as all the following characters up to the end of the lines are not interpreted.
Example:
The “expr_i” are expressions with numeric or boolean values. The optional ELSEIF and ELSE provide for the execution of alternate groups of statements. An END keyword, which matches the IF, terminates the last group of statements.
Example:
if expr1 then statements
elseif expr_i then statements
....
else statements
end