I made a simulation of 10000 times and want to view part of simulation between 5000-5200. I am able to view it with the code below, but the x-axis says 0-250. I want the x-axis to display the exact figure of 5000-5200. Also there seems to be a small gap at the end of the figure as the axis runs up to 250 for some reason. I just want to view the figure in for this set time with the x-axis showing the exact labels and without the gap at the end.
Thanks
N=10000;%Number of simulation
P=0.02;
Q = zeros(N,1); %current value of queue
X=zeros(N,1);%simulation data
Ci=0;
L=0.9;
Bu=zeros(N,1);
Bs=30;
Bd1=50;
Bd2=270;
Ti=0;
for Ti=2:N
U=rand(1);
a=log10(U);
b=log10(1-P);
c=(a/b);
d=1+c;
X(Ti)=round(d);
Ci=Ci+1;
if X(Ti)< (L)*(Bs)
Bu(Ti)=Bs;
else if X(Ti) < (L)*(Bs+Bd1)
Bu(Ti)=Bs+Bd1;
else
Bu(Ti)=Bs+Bd1+Bd2;
end
end
Ti=Ti+1;
end
plot(X(5000:5200,1),'r');
set (gca,'ylim',[0 400]);
hold on;
plot(Bu(5000:5200,1),'b');
set (gca,'ylim',[0 400]);
hold off
Plot expects two inputs, the first depicting the horizontal axis and the second depicting the vertical axis. When you do not supply two inputs, then it computes the length of the single input (in this case that length is 5200-5000 = 200), and it just uses 1 through that length (1:200 in this case) as if it is the values for the horizontal axis variable.
I think you want to issue the command:
plot(5000:5200, X(5000:5200,1), 'r')
Often Matlab will adjust plot axes for better default views, so it's probably showing the axis out to the index 250 just by virtue of some default plotting convention. You can similarly use set(gca, 'xlim', [5000 5200]) if you wish.
Related
I have a composite graph of two line charts. For one of them i'm attempting to apply a custom color range based on the value of each point on the line:
.colors(['rgb(215,48,39)','rgb(244,109,67)','rgb(253,174,97)','rgb(254,224,144)'])
.colorDomain ([0,3])
.colorAccessor (d,i) ->
if d.points[i].data.value.avg > 50
return 0
else
return 3
The problem is I keep getting only one color for the entire graph... Not to mention d returns as an object of all the points instead of a single point... (maybe a hint of the problem?)
Am i doing something wrong here and/or is there an easier way to do this?
You didn't get an answer so I'll try to look into it with you.
First, I created a fiddle at http://jsfiddle.net/djmartin_umich/4ZwaG/.
.colors( ['rgb(215,48,39)', 'rgb(244,109,67)', 'rgb(253,174,97)', 'rgb(254,224,144)' ] )
.colorDomain ([0,3])
.colorAccessor(function(d, i){
if(d[i] && d[i].data.value > 150)
return 3;
else if(d.data.value > 150)
return 2;
else return 1;
});
I had to play around with the color accessor to get it to stop throwing errors. The method was called twice with an array of elements and twice for each element in the array (24 times total).
Once I got it compiling I inspected the chart and saw this:
The chart has a path element that defines the line and a bunch of circles that define the points on the line. The points are part of the tool-tip that display when you hover over the different points on the line.
The path seems to be colored by the value returned when the array of values was passed in and the hover-points on the line are each colored by the value returned for that element.
So the path of the line is given a single color. It sounds like your expectation is for different portions of the line to be colored differently based on their y-value, but this is not how the line is rendered.
The article at http://www.d3noob.org/2013/01/applying-colour-gradient-to-graph-line.html describes how you can use gradients to achieve the effect you desire. I believe the author is "hard-coding" the start and stop points for each gradient, so it won't get you all the way to your answer but it should help you get started.
I hope this helps!
-DJ
I'm trying to use the answers I found in these questions:
How to save a plot into a PDF file without a large margin around
Get rid of the white space around matlab figure's pdf output
External source
to print a matlab plot to pdf without having the white margins included.
However using this code:
function saveTightFigure( h, outfilename, orientation )
% SAVETIGHTFIGURE(H,OUTFILENAME) Saves figure H in file OUTFILENAME without
% the white space around it.
%
% by ``a grad student"
% http://tipstrickshowtos.blogspot.com/2010/08/how-to-get-rid-of-white-margin-in.html
% get the current axes
ax = get(h, 'CurrentAxes');
% make it tight
ti = get(ax,'TightInset');
set(ax,'Position',[ti(1) ti(2) 1-ti(3)-ti(1) 1-ti(4)-ti(2)]);
% adjust the papersize
set(ax,'units','centimeters');
pos = get(ax,'Position');
ti = get(ax,'TightInset');
set(h, 'PaperUnits','centimeters');
set(h, 'PaperSize', [pos(3)+ti(1)+ti(3) pos(4)+ti(2)+ti(4)]);
set(h, 'PaperPositionMode', 'manual');
set(h, 'PaperPosition',[0 0 pos(3)+ti(1)+ti(3) pos(4)+ti(2)+ti(4)]);
% save it
%saveas(h,outfilename);
if( orientation == 1)
orient portrait
else
orient landscape
end
print( '-dpdf', outfilename );
end
Results in this output:
As you can see the 'PaperSize' seems to be set not properly. Any idea of possible fixes?
NOTE
If I change the orientation between landscape and portrait the result is the same, simply the image is chopped in a different way.
However if I save the image with the saveas(h,outfilename); instruction the correct output is produced.
Why is this? And what is the difference between the two saving instructions?
Alltogether the answers you mentioned offer a lot of approaches, but most of them didn't worked for me neither. Most of them screw up your papersize when you want to get the tight inset, the only which worked for me was:
set(axes_handle,'LooseInset',get(axes_handle,'TightInset'));
I finally wrote a function, where I specify the exact height and width of the output figure on paper, and the margin I want (or just set it to zero). Be aware that you also need to pass the axis handle. Maybe this functions works for you also.
function saveFigure( fig_handle, axes_handle, name , height , width , margin)
set(axes_handle,'LooseInset',get(axes_handle,'TightInset'));
set(fig_handle, 'Units','centimeters','PaperUnits','centimeters')
% the last two parameters of 'Position' define the figure size
set(fig_handle,'Position',[-margin -margin width height],...
'PaperPosition',[0 0 width+margin height+margin],...
'PaperSize',[width+margin height+margin],...
'PaperPositionMode','auto',...
'InvertHardcopy', 'on',...
'Renderer','painters'... %recommended if there are no alphamaps
);
saveas(fig_handle,name,'pdf')
end
Edit: if you use painters as renderer saveas and print should produce similar results. For jpegs print is preferable as you can specify the resolution.
Can someone provide some insight on how scales and extents work together in cubism.js
.call(context.horizon()
.extent([-100, 100])
.scale(d3.scale.linear().domain([-10,10]).range([-100,100])
)
);
For example what does the code above do? If the values are generated using a random number generator (numbers between -10 and 10)
I know extent is used to set the maximum and minimum.
I know how to define a scale, example:
var scale = d3.scale.threshold().domain([100]).range([0,100])
console.log(scale(1)) // returns 0
console.log(scale(99.9)) // returns 0
console.log(scale(88.9)) // returns 0
console.log(scale(100)) // returns 100
I read about d3.scales here http://alignedleft.com/tutorials/d3/scales/
My main issue is that I want to define thresholds for my data, very simple
0-98 Red
98-100 Pink
100 Blue
Or maybe just
0-99.99 Red
100 Blue
But I'm not being able to use all what I've read to construct something that works.
I'm guessing that you just want to use a different color to represent anomalies in your data. If that is true, you don't need to create a domain and range.
You can just create a custom color palette like this:
var custom_colors = ['#ef3b2c', '#084594', '#2171b5', '#4292c6', '#6baed6', '#9ecae1', '#c6dbef', '#deebf7', '#f7fbff', '#f7fcf5', '#e5f5e0', '#c7e9c0', '#a1d99b', '#74c476', '#41ab5d', '#238b45', '#006d2c', '#00441b'];
This color palette was constructed using the palette on this page with an extra red color tacked on to the end.
Then just call the custom colors like this:
d3.select("#testdiv")
.selectAll(".horizon")
...
.call(context.horizon()
.colors(custom_colors)
));
Play around with the colors until you find a combination that you like. In this above example, only the outlier will be in red while the rest will follow the blue and green pattern.
Hope this helps!
Is there a way in d3 to not draw overlapping tick labels? For example, if I have a bar chart, but the bars are only 5 pixels wide and the labels are 10 pixels wide, I end up with a cluttered mess. I'm currently working on an implementation to only draw the labels when they do not overlap. I can't find any existing way to do that, but wasn't sure if anyone else had dealt with this problem.
There is no way of doing this automatically in D3. You can set the number of ticks or the tick values explicitly (see the documentation), but you'll have to figure out the respective numbers/values yourself. Another option would be to rotate the labels such that there is less chance of them overlapping.
Alternatively, like suggested in the other answer, you could try using a force layout to place the labels. To clarify, you would use the force layout on the labels only -- this is completely independent of the type of chart. I have done this in this example, which is slightly more relevant than the one linked in the other answer.
Note that if you go with the force layout solution, you don't have to animate the position of the labels. You could simply compute the force layout until it converges and then plot the labels.
I've had a similar problem with multiple (sub-)axis, where the last tick overlaps my vertical axis in some situations (depending on the screen width), so I've just wrote a little function that compares the position of the end of the text label with the position of the next axis. This code is very specific to my use case, but could adapted easily to your needs:
var $svg = $('#svg');
// get the last tick of each of my sub-axis
$('.tick-axis').find('.tick:last-of-type').each(function() {
// get position of the end of this text field
var endOfTextField = $(this).offset().left + $(this).find('text').width();
// get the next vertical axis
var $nextAxis = $('line[data-axis="' + $(this).closest('.tick-axis').attr('data-axis') + '"]');
// there is no axis on the very right, so just use the svg width
var positionOfAxis = ($nextAxis.length > 0) ? $nextAxis.offset().left : $svg.offset().left + $svg.width();
// hide the ugly ones!
if (endOfTextField > positionOfAxis) {
$(this).attr('class', 'tick hide');
}
});
The ticks with color: aqua are the hidden ones:
I'm drawing several heatmaps using the image() function in R.
The sizes of the heatmaps are quite variable, so every heatmap has a different height, however I want the row heights be uniform across heatmaps.
So I create heatmaps from these two matrices, and the heights of each cell are different between two heatmaps:
m1<-replicate(40, rnorm(20))
image(1:ncol(m1), 1:nrow(m1), t(m1), axes = FALSE,xlab="",ylab="")
m2<-replicate(40, rnorm(10))
image(1:ncol(m2), 1:nrow(m2), t(m2), axes = FALSE,xlab="",ylab="")
For the life of me, I can't figure out how can I specify the row height. It must be a very easy fix, but I can't figure it out.
You give very limited information. E.g., do you want to create PDFs? Or place several plots on one page?
Here is one solution:
par(fin=c(5,5),mar=c(0,0,0,0))
image(1:ncol(m1), 1:nrow(m1), t(m1), axes = FALSE,xlab="",ylab="")
par(fin=c(5,2.5),mar=c(0,0,0,0))
image(1:ncol(m2), 1:nrow(m2), t(m2), axes = FALSE,xlab="",ylab="")
I am sure there are more elegant solutions depending on what you actually want to do with the graphs.
Just set a common maximum number of rows for all the heatmaps using the ylim parameter:
m1<-replicate(40, rnorm(20))
m2<-replicate(40, rnorm(10))
image(1:ncol(m1), 1:nrow(m1), t(m1), axes=FALSE, ann=FALSE, ylim=c(0, max(sapply(list(m1,m2),nrow)) ))
image(1:ncol(m2), 1:nrow(m2), t(m2), axes=FALSE, ann=FALSE, ylim=c(0, max(sapply(list(m1,m2),nrow)) ))
You may want to manually specify the ylim argument and have that be the same between the 2 plots:
par(mfrow=c(1,2))
image( 0:ncol(m1), 0:nrow(m1), t(m1), axes=FALSE, xlab='', ylab='',
ylim=c(0,nrow(m1)) )
image( 0:ncol(m2), 0:nrow(m2), t(m2), axes=FALSE, xlab='', ylab='',
ylim=c(0,nrow(m1)) )