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How to use the constant e?. Learn more about . So the question is given x =0.2 calculate (x^2) *e^4. I know for pi you just type pi which is just pi in the command.
Description. Y = exp (X) returns the exponential ex for each element in array X. For complex elements z = x + iy, it returns the complex exponential. e z = e x (cos y + i sin y). Use expm to compute a matrix exponential. example.
ans =. z^3 - (3*z^2)/2 + 1/4. If the second argument is a number, euler evaluates the polynomial at that number. Here, the result is a floating-point number because the input arguments are not symbolic numbers: euler(2, 1/3) ans =. -0.2222. To get the exact symbolic result, convert at least one number to a symbolic object:
E could be confusing indeed, unless MATLAB Development Team decided to keep only e as a scientific notation for 10, so that E becomes a free variable that we could possible use for Euler's number. I contacted MATLAB Development Team to consider this urgent matter; hope they will consider it in future releases of MATLAB.
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Euler's Number. This function gives the numerical value of Euler's number accurate to 10,000 significant digits. Have you ever wondered why Euler's number e = 2.71828... is not a built-in constant in MATLAB? We can produce Euler's number in MATLAB by evaluating exp (1), or possibly using exp (sym (1)) for the exact representation.
For the value e = 2.71828…, called Euler’s number, use exp(1) to return the double-precision representation. For the exact representation of Euler’s number e, call exp(sym(1)). For the other meaning of Euler’s numbers and for Euler’s polynomials, see euler.
That is not the true binary expansion, which has infinitely many bits, since e is a transcendental number. so the value e=exp(1) is rounded at the least significant bits as it is stored in MATLAB. If you then compute e.^A, you compound the errors, partly because e was not the correct number, but also because there are additional tiny errors ...
Create a variable and display output in the short format, which is the default. x = [25 56.31156 255.52675 9876899999]; format short. x. x = 1×4. 10 9 ×. 0.0000 0.0000 0.0000 9.8769. Set the format to shortG and redisplay the values.
If you are using the variable browser then at the top of the area you have the ability to change the format for that one variable (until you have close that browser on the variable), or you can look in Preferences to adjust the default used by the variable browser.