Do not understand why my code isn't working!

it should be simple, but nothing show in the figure and nothing is reported by the debugger.

x1=linspace(0,0.1,0.49);
x2=linspace(0.51,0.1,1);
y1=1./(2*x1-1);
y2=1./(2*x2-1);
plot(x1,y1), plot(x2,y2), grid

Answer 1

[Roger Stafford]

The third argument in 'linspace' is interpreted as the number of desired points, so you will get at most one point in each one. It is not the same as the colon operator. See

   http://www.mathworks.com/help/matlab/ref/linspace.html

Answer 2

[Image Analyst]

You're mixing two ways of specifying a range of variables into one single way that does not work. Here, check out my code to see the two ways. Just pick one of them:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
fontSize = 20;

% Two ways of specifying x.  Pick one:
% Method 1:
x1 = 0 : 0.1 : 0.49;
x2 = 0.51 : 0.1 : 1;
% Method 2:
x1 = linspace(0, 0.1, 15);
x2 = linspace(0.51, 0.1, 300);

y1=1./(2*x1-1);
y2=1./(2*x2-1);
plot(x1,y1, 'bo-', 'LineWidth', 2)
hold on;
plot(x2,y2, 'r*-', 'LineWidth', 2);
grid on;
xlabel('X', 'FontSize', fontSize);
ylabel('Y', 'FontSize', fontSize);
title('Y1 and Y2 vs. X', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);