Plot - Grid problem : I need grid for each increment in x

clear all clc

y=[ 8 0 5 5 4 0 8 1 7 3 5 1 4 8 2 7 2 0 ]; x=[ 1 0 4 0 5 1 5 1 8 3 4 6 4 7 ];

Tx=length(x); Ty=length(y);

for i=1:Tx j(i)=floor((Ty/Tx)*i); end

plot(1:length(j),j) grid on

My doubt is, How can I plot grids for each point of x axis. suppose, for the above program plot showing grid for every 2 increment of x axis. I need for grid for each single step increment so that I can analyz my problem easily.

Please give your answer for my problem.

Answer 1

[Matt Fig]

% First your plot:  
y=[8 0 5 5 4 0 8 1 7 3 5 1 4 8 2 7 2 0 ]; 
x=[ 1 0 4 0 5 1 5 1 8 3 4 6 4 7];

Tx=length(x); 
Ty=length(y);

for i=1:Tx 
    j(i)=floor((Ty/Tx)*i); 
end

plot(1:length(j),j) 
grid off

% Now make your grid...
YL = get(gca,'ylim');

for ii = 1:length(j)
    line([j(ii) j(ii)],YL,'linestyle','--','color','k');
end

.

.

EDIT

Or without the FOR loop:

% Now make your grid...
YL = get(gca,'ylim');
line([j;j],repmat(YL.',1,length(j)),'linestyle','--','color','k')

.

.

EDIT2

I see that you wanted the gridpoints at the x locations, not the j locations. Simply substitute an x where I have put a j...

[Raviteja]

Thanks!

But I lost Y axis alignments! Please clarify this.

I need y axis grids also.

that is 1 to 1 map grid I needed..

[Matt Fig]

I don't quite understand. Do you mean you want to have grids where the y's are too? If so, simply add:

XL = get(gca,'xlim');

line(repmat(XL.',1,length(y)),[y;y],'linestyle','--','color','k')

[Raviteja]

Try this code:

clear all

clc

clf

y=[8 0 5 5 4 0 8 1 7 3 5 1 4 8 2 7 2 0 ];

x=[ 1 0 4 0 5 1 5 1 8 3 4 6 4 7];

Tx=length(x);

Ty=length(y);

for i=1:Tx

j(i)=floor((Ty/Tx)*i);

end

plot(1:length(j),j,'r')

hold on

m=Ty/Tx;

y=m*(1:Tx);

plot(y)

YL = get(gca,'ylim');

line([j;j],repmat(YL.',1,length(j)),'linestyle','--','color','k')

XL = get(gca,'xlim');

line(repmat(XL.',1,length(y)),[y;y],'linestyle','--','color','k')

xlim([1 Tx])

here horizontal lines missed its exact positions.

[Matt Fig]

It looks to me like the horizontal lines got the exact position. Did you take into account that you re-defined your y variable?

[Raviteja]

sorry! I used y variable and modified. It is my mistake.

Next problem is, some grids are missing! try this code!

clear all

clc

clf

y=[8 0 5 5 4 0 8 1 7 3 5 1 4 8 2 7 2 0 ];

x=[ 1 0 4 0 5 1 5 1 8 3 4 6 4 7];

Tx=length(x);

Ty=length(y);

for i=1:Tx

j(i)=floor((Ty/Tx)*i);

end

plot(1:length(j),j,'r')

hold on

m=Ty/Tx;

p=m*(1:Tx);

plot(p)

YL = get(gca,'ylim');

line([j;j],repmat(YL.',1,length(j)),'linestyle','--','color','k')

XL = get(gca,'xlim');

line(repmat(XL.',1,length(y)),[y;y],'linestyle','--','color','k')

xlim([1 Tx])

[Matt Fig]

And which grids are missing? Did you see my not about changing the j to x if you want vertical grids at the x location?

[Matt Fig]

Also, (see previous comment) did you notice that you are setting the xlim to be less than the smallest vertical grids?