In my tradingview strategy I would like to plot the MACD macdLine and signalLine ontop of my chart.
// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
//#version=5
strategy('MACD',
overlay=true,
process_orders_on_close=true,
default_qty_type=strategy.percent_of_equity,
initial_capital=1000,
default_qty_value=100)
[macdLine, signalLine, histLine] = ta.macd(close, 12, 26, 9)
plot(macdLine, color=color.blue)
plot(signalLine, color=color.orange)
When the overlay attribute of my strategy is set to true, the lines are not plotted ontop of my chart. If it is set to false, it adds the MACD lines and everything is fine.
How can I draw them in overlay=true ontop of my chart?
Related
Expected:
I want to divide single line into 2 parts based on x axis value.
Example, when x-value is greater than "2016-8" show dashed line as following
Tried with ECharts visualMap, but it only works depending on y-axis value
https://echarts.apache.org/examples/en/editor.html?c=line-aqi
It seems VisualMap can only be used to change the color and/or symbol of the line.
Different colors on the same line using VisualMap on xAxis
If you don't specifically need to get a dashed line and you just want to use VisualMap on xAxis, you should set visualMap-piecewise.dimension to 0 (0 being x and 1 being y in simple [x,y] series).
visualMap: {
dimension: 0,
},
Then you'll need to set your list of pieces depending on the type of xAxis ('time' or 'category'):
'time' : full example
'category' : full example
Dashed line on half the series
If you specifically need to get this :
when x-value is greater than "2016-8" show dashed line as following
You can split your series in 2 different series and affect a different line style to each of them:
Series 1: date <= "2016-8" (solid line)
Series 2: date >= "2016-8" (dashed line)
Here is a working example.
I'm looking for a working example to have a .png picture as the background of a scatter chart.
Currently, I use mark_image to draw the background image:
source = pd.DataFrame.from_records([
{"x": 0, "y": 0,
"img": "http://localhost:8888/files/BARTStreamlit/assets/BARTtracksmap.png?_xsrf=2%7Ce13c35be%7Ce013c83479b892363239e5b6a77d97dc%7C1652400559"}
])
tracksmap = alt.Chart(source).mark_image(
width=500,
height=500
).encode(
x='x',
y='y',
url='img'
)
tracksmap
Here is the resulted image drown:
and draw the scater chart,
chart = alt.Chart(maptable).mark_circle(size=60).encode(
x= 'x',
y= 'y',
tooltip=['short_name', 'ENTRY']
).interactive()
chart
I have scaled the x, y channel values for the scatter chart to be in the range of [0, 500]. 500 is the width and height of the background image that I guessed.
Here is the resulted scatter plot:
then I combined the two chart with layer mechanism:
geovizvega = alt.layer(tracksmap, chart)
geovizvega
resulting the following:
The two charts do not align. I'd like to have the scatter dots aligning with the tracks on the background image. How can I achieve that?
To have them aligned, I might need to have the background image's top left corner at the coordinates (0, 0), how can I achieve that? (It seems that the x, y channel values for mark_image is the coordinates of the center of the image? With accurate definition of the x, y channel values, it might be possible to calculate the proper value of x, and y for the top left coroner to be at (0, 0)).
I might need to to have precise dimension of the background image. How?
My above approach may not be the right one. Please show me a working example.
Yes, if you change the values of x and y in your image plot to something like y=-200 and x=200, the image should be more centered in the scatter plot.
You can also change the anchor point of the image using align and baseline:
import altair as alt
import pandas as pd
source = pd.DataFrame.from_records([
{"x": 2, "y": 2, "img": "https://vega.github.io/vega-datasets/data/7zip.png"}
])
imgs = alt.Chart(source).mark_image(
width=100,
height=100
).encode(
x='x',
y='y',
url='img'
)
imgs + imgs.mark_circle(size=200, color='red', opacity=1)
imgs = alt.Chart(source).mark_image(
width=100,
height=100,
align='right',
baseline='top'
).encode(
x='x',
y='y',
url='img'
)
imgs + imgs.mark_circle(size=200, color='red', opacity=1)
After this, you would still need to change the dimensions of the chart so that it has the same size as the image. The default is width=400 and height=300. You can get the dimensions of your image in most image editing software or using the file <imagename> command (at least on linux). But even after getting these dimensions, you would have to do some manual adjustments due to axes taking up some of that space in the chart.
I'm making a weather display graph using GNUplot with a weather API. I'm currently plotting the next 48 hours of temperature and rainfall.
As you can see in the above image, the temperature is the line with the axis defined on the left; while the rainfall is depicted by the bar graph (bottom left) and its axis is defined on the right. (0, 0.5, 1).
I would however like to include other data in the graph as well. The first thing I want to include is cloud cover at the top of the graph. Again as a bar graph.
I'm including a mockup that I made is a graphic editor:
Is there a way to do this with gnuplot, or will I have to use another program to accomplish it?
You have y1-axis on the left and y2-axis on the right. If you want to have a 3rd y-axis you have to shift it somehow. One way to achieve this is with multiplot, basically several plots on top of each other.
You have to make sure that all plots are using the same (fixed) margins on the canvas (automargin probably won't work) and the same xrange (the second plot takes it from the first plot). Check the following example with some random data. Certainly, some fine tuning could be done. Adapt it to your needs.
Code:
### Three y-axes
reset session
# create some test data
myTimeFmt = "%d.%m.%Y %H:%M:%S"
set print $Data
do for [i=1:48] {
myTime(i) = strftime(myTimeFmt, time(0)+i*3600)
myTemp(i) = sin(i/5.)*5 + 20 + rand(0)
myRain(i) = int(rand(0)+0.3) * rand(0)*20
myCloud(i) = rand(0)*50
print sprintf("%s %g %g %g",myTime(i),myTemp(i),myRain(i),myCloud(i))
}
set print
set key off
set margins screen 0.1, screen 0.8, screen 0.1, screen 0.94
set multiplot
set format x "%H:%M" timedate
set xtics 3600*6
set grid xtics, mxtics, ytics, mytics
##### first plot
set ylabel "Temperature °C" tc "red"
set yrange[10:30]
set ytics nomirror tc "red"
set y2label "Rain / mm" offset -1,0 textcolor rgb "blue"
set y2range[0:40]
set y2tics nomirror tc "blue"
set style fill solid 1.0
plot $Data u (timecolumn(1,myTimeFmt)):3 axes x1y1 w l lc "red", \
'' using (timecolumn(1,myTimeFmt)):4 axes x1y2 w boxes lc "blue"
unset xlabel
unset ylabel
unset y2label
unset tics
##### Second plot
set bmargin screen 0.73
set border 4
set xrange[GPVAL_X_MIN:GPVAL_X_MAX] # identical xrange like 1st plot
set y2range[100:0] reverse
plot $Data u (timecolumn(1,myTimeFmt)):5 axes x1y2 w boxes lc rgbcolor "grey"
##### Third plot (just for 3rd y-axis)
set rmargin at screen 0.9
set border 8 # only right border visible
set y2label "Cloud coverage" offset -1,0 textcolor rgb "black"
set y2tics nomirror offset 0,0
plot NaN # plot some dummy
unset multiplot
### end of code
Result:
I generate a transparent chart that lets the background of a web page be seen through it.
So far I've done this (omited the populating of dataset for brevity):
lineChartObject=ChartFactory.createLineChart("Title","Legend","Amount",line_chart_dataset,PlotOrientation.VERTICAL,true,true,false);
CategoryPlot p = lineChartObject.getCategoryPlot();
Color trans = new Color(0xFF, 0xFF, 0xFF, 0);
lineChartObject.setBackgroundPaint(trans);
p.setBackgroundPaint(trans);
for (int i=0;i<=3;i++){
lineChartObject.getCategoryPlot().getRenderer().setSeriesStroke(i, new BasicStroke(3.0f));
lineChartObject.getCategoryPlot().getRenderer().setBaseItemLabelsVisible(false);
}
Which renders this:
I cannot find a way of:
Removing border of plot (1)
Removing border of leyend as well as making it transparent (3)
Making the labels on the X axis (2) to behave intelligently as the labels of Y axis do (A). Labels of Y axis space themselves so as to not clutter the graph, for example if I rendered the graph smaller, it would show fewer labels, like this:
Edit: X label domain is dates.
For (1) try:
plot.setOutlineVisible(false);
For (2), a common reason for having too many categories along the x-axis is that the data is actually numerical, in which case you should be using XYPlot rather than CategoryPlot. With XYPlot, the x-axis scale adjusts in the same way that the y-axis does.
Edit from OP: Using a TimeSeriesChart with a TimeSeriesCollection as XYDataSet did the work! (fotgot to say X domain is dates)
For (3) try:
LegendTitle legend = chart.getLegend();
legend.setFrame(BlockBorder.NONE);
legend.setBackgroundPaint(new Color(0, 0, 0, 0));
Specifically I am looking to add text annotations to specific locations to a JFreeChart that is being output to a png file for web use. Can/how do annotations get added to pie charts. I have been able to successfully add annotations to XYPlots, but don't know how to overlay or add one to a PiePlot.
My full task is to use the PiePlot to create a sort of clock. So far everything has worked great, but now I need to add labels at the 12, 3, 6, and 9 o'clock locations and completely stumped.
Adam
Bit of an old question, but here's how I did something similar (annotation at 1, 2, 3, ... o'clock positions) using a polar plot. It uses a ChoiceFormatter and the NumberTickUnit:
final JFreeChart chart = ChartFactory.createPolarChart(
"HAPI Hourly Usage (UTC)", ds, true, true, false);
final PolarPlot plot = (PolarPlot) chart.getPlot();
// Create a ChoiceFormat to map the degrees to clock positions
double[] limits = new double[12];
String[] formats = new String[12];
limits[0] = 0;
formats[0] = "12";
// degrees = 360/12
for (int i = 1; i < limits.length; i++) {
limits[i] = degrees * (i);
formats[i] = Integer.toString(i);
}
ChoiceFormat clock = new ChoiceFormat(limits, formats);
TickUnit tickUnit = new NumberTickUnit(degrees, clock);
// now configure the plot
plot.setAngleTickUnit(tickUnit); // sets the ticks
plot.setAngleLabelsVisible(true); // makes the labels visible
plot.setAngleLabelPaint(Color.LIGHT_GRAY); // user choice
plot.setAngleGridlinesVisible(true); // must set this to display the
// labels
plot.setAngleGridlinePaint(Color.BLACK); // plot's background color
// (makes lines invisible)
plot.setRadiusGridlinesVisible(false); //turn off the radius value circles
ValueAxis axis = plot.getAxis();
axis.setTickLabelsVisible(false); //turn off the radius value labels
winds up looking like http://img522.imageshack.us/img522/6693/hapihours.jpg
After a fairly strenuous search I don't believe this is currently possible (JFreeChart 1.0.13).
Possible options are:
Create a second chart with an XYPlot to generate a second image with needed annotations. Overlay this image on the page. This option is bad because it doubles the number of chart images to be uploaded.
Set the image as a background on the page and HTML the text over the image. Bad because it isn't maintainable and makes a headache of data transfer.
Personally I am just going to find another way to communicate the information in the title, but I wanted to post my findings for the next person.
Adam