MATLAB Answers

How to convert 1.35678e-01 to numerical digits in matalb?

Hello,
I am doing image processing and after segmentation i extract few Features like GLCM, entropy,Area etc. All these answers come as 1.3456e-01, 3.564676e+01 etc. . Is there any way to convert this to normal numerical numbers? I use Matlab 2014a. Please help me with respect to this.Thank you

  2 Comments

What do you mean by "normal numerical numbers"? Those are normal numbers. Are those values coming back as strings you need to convert to numbers? If thats the case str2num or str2double will convert them. Otherwise its just display formatting. Try "format long g" to change how the command window displays numbers.
Hello Joel Handy,
For example i use the following commands:
clc;
clear all;
close all;
a=imread('coins.png');
glcm=graycomatrix(a);
stats=graycoprops(a);
But i get output as follows:
Contrast: 1.2782e+04
Correlation: -0.0012
Energy: 1.7541e-05
Homogeneity: 0.0327
As u can see contrast and energy are in scientific notation. I need it in normal whole numbers like 0.005, 12345, 89898 etc. Please help me in this.

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1 Answer

Answer by Adam Danz
on 18 Jul 2019
 Accepted Answer

" I need it in normal whole numbers like 0.005, 12345, 89898 etc"
Setting the format to longg (not long!) or shortg will solve the problem for the 'Contrast' value but not the 'Energy' value.
format longg
stats =
struct with fields:
Contrast: 12781.9263669137
Correlation: -0.00117293439093276
Energy: 1.75410617429713e-05
Homogeneity: 0.0326985233071923
format shortg
stats =
struct with fields:
Contrast: 12782
Correlation: -0.0011729
Energy: 1.7541e-05
Homogeneity: 0.032699
How will you be using the numbers? If you're just passing them on to another function this change in format does nothing. If you're printing them, you can convert them to strings like this
sprintf('%.6f',stats.Energy)
ans =
'0.000018'

  8 Comments

Hi Adams/Walter, I am manually copy pasting my features to Excel.However except area feature which comes as 4 digit number like 4000 etc all the other features are in scientific notation i mean 3.34****E+02.Is this fine for classification or all features must be in 1 type only? Please reply.
They will all become datatype double when you load them from excel.

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