decimal in wrong position when dividing a 1x10 column by single variable.

F = [0;1650;3400;5200;6850;7750;8150;8500;8750;9000];
A = (0.4/2)^2 * pi();
sigma = F/A

sigma = 10×1

1.0e+04 * 0 1.3130 2.7056 4.1380 5.4511 6.1673 6.4856 6.7641 6.9630 7.1620

% my problem occures when i divide F/A. The decimal place is shifted over 4 positions to the left

% the answers are the same, just the decimal place is off.

[Torsten]

You see the 1.0e+04 above with which the values in the column have to be multiplied ? Or what is your question ?

Answer 1

[Walter Roberson]

format long g
F = [0;1650;3400;5200;6850;7750;8150;8500;8750;9000];
A = (0.4/2)^2 * pi();
sigma = F/A

sigma = 10×1

1.0e+00 * 0 13130.2828050814 27056.3403256222 41380.2852038928 54510.5680089742 61672.5404481094 64855.6393099473 67640.8508140555 69630.2876027042 71619.7243913529

The answers were not wrong: you were just overlooking the 1.0e+04 * just before the numbers. When you use the (default) format short then if you have numbers above about 100 or below about 0.01 in the mix, then the result will be show in scientific notation with a common factor shown at the top.