MATLAB: I WANT TO EXTEND MY GRAPH WITHOUT DISTURBING THE MATRIX PLOT

Question

I AM PLOTTING A DATA MATRIX X— plot(X) DUE TO WHICH I AM GETTING THE FOLLOWING GRAPH

X= [-1.961 -1.527 -0.194 -1.475 -1.023 -0.188 -2.255 -1.482 -1.156 -0.150 -1.121 -0.772 -0.145 -1.709 ….. 21.297 15.975 3.164 20.255 12.603 3.304 28.146 21.848 16.397 3.259 20.872 12.974 3.408 28.946];

I want to change the x-axis from -5 to 400. but when i try to change it the x-axis plot from 0 to 45 is retained while the rest is left blank.

What i want is this;

If i change the axis for the plot using axis([0 400 0 30]),i am getting a compressed version;see below image

I want the graph to stretch to the limit of 400 without disturbing the graph. Please somebody help…

Answer 1

the x vector you mentioned actually goes through the y axis... and in the black and white graph the x axis have a rank from 1 to 400. you should define an other vector (for example xx) and re plot like this plot(xx,x) in which the xx contains length(x) values (same lengths as x) .xx=[0 1 5 10 15 20 80 100 150 200 250 .... 400];