I just started using flotr2 and I want to have labels with many decimal numbers, for example 1.3333338.How you define that on flotr2 yaxis;
In your options object you initialise the graph with, you should define the number of decimals for the axis:
yaxis: (
tickDecimals: 7
}
Related
I have a lineseries chart using LightningChart-JS, I need the x-axis numbers to be in descending order. The order of how the x,y points were added we're in descending order. Please help.
test lineseries
To invert the Axis, you can use Axis.setInterval.
chart.getDefaultAxisX().setInterval(1, -1)
As long as automatic fitting is enabled, the actual values don't matter.
Rather the key part is that the start value is higher than end value, resulting in inverted axis.
I'm plotting some data, with xticks that have both whole and unwhole numbers. My x-axis looks like this:
This is the axis code I used: scale_x_reverse(breaks = round(seq(100,0,by = -100/6),digits = 1)).
My goal is to only show the decimal point when it's needed i.e when the number is not whole. In my example it would mean removing the '.0' after 100 and 50, while leaving the decimal points of the other ticks.
How can I make an x-axis that doubles for every increment? I want equal distances between 0, 128, 256, 512, 1024 and 2048. How can I do that?
I'm trying to plot points from a benchmark where I measured time and doubled the memory size every increment.
You can cheat and plot with a linear axis, like from 1 up to as many numbers as you desire, then change the labels when you're done. You can use the 'xtick' property to set what horizontal tick values on your graph remain and the 'xticklabel' property to change the labels to your desired values.
labels = [0 128 256 512 1024 2048]; % Provide your labels here
x = 1 : numel(labels);
y = rand(1, numel(x)); % Insert your data here
plot(x, y, 'b.'); % Plot your data
set(gca, 'xtick', x); % Change the x-axis so only the right amount of ticks remain
set(gca, 'xticklabel', labels) % Change the labels to the desired ones
I get the following graph. Note that the data I'm plotting is completely random as I don't have your data but I want to demonstrate what the changed plot looks like:
For more properties that you can change on your graph, see the Axes Properties page on the Octave docs.
With apologies to Rayryeng, since I'm essentially proposing the same method at heart, but I felt it was missing important info, such as how to convert the axis itself to equally spaced intervals in the first place, without messing with the data. So here's a complete solution for example data X vs Y, producing the equivalent of semilogx for base 2.
Y = 1 : 10;
X = 2 .^ Y;
XTicks = log2(X);
XTickLabels = {};
for XTick = XTicks
XTickLabels{end+1} = sprintf('2^{%d}', XTick);
end
plot (log2 (X), Y);
set(gca, 'xtick', XTicks, 'xticklabel', XTickLabels);
Note that if you plan to 'superimpose' another plot on top of this, you'll have to take into account that the actual values in the X axis are essentially "1, 2, 3, ... 10", so either "log-ify" the new plot's X-axis values too, before superimposing via hold on, or plot onto another, independent set of axes entirely and place them in the same position.
Note: I have assumed that you're after a base-2 logarithmic x-axis. If you do actually want the 0-128 interval to be the same as the 128-256 interval, then modify as per Rayrengs answer --- or even better, use a more appropriate graph, like a bar graph! (i.e. with the 'powers-of-two' used purely as descriptive labels for each column)
I am able to create a 2-D plot using two parameters in IDL, i.e., star formation rate (y-axis) vs. time (x-axis).
But I would like to include the redshift (another variable) corresponding to each data point, say, as the top x-axis. It didn't work when I tried adding the third variable to PLOT procedure, and I have not been able to find any discussion on how to accomplish this online. Any help is appreciated.
First run PLOT.PRO with the NODATA keyword set and XAXIS=4 and YAXIS=4 to suppress each axis. Then you can use the AXIS.PRO program to define each axis. Then you can use OPLOT.PRO to draw the points of Z vs. X and Z vs. Y, where Z = star formation rate, X = time, and Y = redshift. Look up details on the [XYZ]AXIS keywords to determine which axis to draw at each time. You can even color each axis using the COLOR keyword with the AXIS.PRO program.
The only trick is that you will have to scale the Y data points to the X-axis scale prior to plotting because you will explicitly define the [XYZ]RANGE when calling PLOT.PRO (well you could do the converse and scale it to Y and redefine X, it's your choice). You need to do this scaling because OPLOT.PRO and, say, PLOTS.PRO use the original [XYZ]RANGE defined when calling PLOT.PRO to convert device coordinates to data coordinates.
Does that make sense?
first call PLOT, TIME, SFR with XSTYLE=9 to force exact range and suppress the top x-axis
then use the AXIS procedure to create the top x-axis
be careful with the ticks of that axis, which you want to correspond to a REDSHIFT that you compute from the TIME variable
example with a bottom x-axis in velocity and a top y-axis in frequency:
> plot, vel, spec, xsty=9, xtick_get=xtick, xtit='Velocity (km/s)', ytit='Antenna Temperature (K)'
> axis, !x.crange[0], !y.crange[1], xaxis=1, xtickv=((ref_freq - ref_freq/299792.458*xtick)), xtickformat='(F8.3)', xticks=n_elements(xtick)-1, xrange=(ref_freq - ref_freq/299792.458*minmax(!x.crange)), chars=1.5
You could always set the color to be the third dimension (ie. color or size).
As the title says, I want to control the range and the amount of xtics. I use gnuplot for plotting data files in which the horizontal axes is usually time (t) taking values in the interval [0, t_max]. OK, now let's suppose the following scenario:
The maximum value of time is 4086 and this particular value is not known beforehand. However, it can be found using
stats "data.out" u 1
set xrange [0:STATS_max]
My question is how can I round up the maximum value of t to the closest hundred (4100 in this case)? Also, is there a way to tell gnuplot to print only 5 ticks at the horizontal axes regardless of its range (rounding up the maximum value to the closest hundred, or decade it will always be divided by 5)?
Many thanks in advance!
To round up to the closest hundred, just use the ceil function:
set xrange[0: 100*ceil(STATS_max/100.0)]
Regarding the xtics, you can only set the start, increment, end, and explicit tic position of the tics, but not the number of ticks. But since you set the xrange manually, you can use this information to calculate the tic frequency:
x_lim = 100*ceil(STATS_max/100.0)
set xrange[0: x_lim]
set xtics x_lim/4.0