I have a data series with 5 decimals such as 0,58861; now I plot with a XYChart as LineChart but I only see 3 numbers plotted, i.e. 0,58 or .584.
I have also tryed to change font size
yAxis.setTickLabelFont(Font.font("Arial", 5));
with no result, I always have 3 numbers plotted.
Below are two picture to show this behavior.
How to set more decimal on Y axis?
So what is wrong with that y-axis plotted numbers? You can think 0.58 as 0.58000 etc. These are just major ticks and not the points (numbers) of your data series. If you want to see more ticks and hence more precise measure values change the tickUnit parameter:
NumberAxis(double lowerBound, double upperBound, double tickUnit)
But this time if your datas range (upperBound-lowerBound) is large according to tickUnit then your graph's shape and form will degrade. To overcome this problem play with lowerBound and upperBound values to show only part of your data series as like they have been zoomified.
To change the tick label font and size, try:
yAxis.setTickLabelFont(Font.font("Arial", FontWeight.MEDIUM, 18));
Changing the font size will not help. You have to change the tick label formatter using the setTickLabelFormatter function.
Related
I want to write a program to transform temperature dependend data into an Arrhenius plot. An Arrhenius plot show the logarithm of a property that is thermally acitavted versus the reciprocal temperature aka 1/T. Now is 1/T something that most people are not used to. This is why most of the plot also contain the translation in temperature on a second axis. Usually on top of the graph. The output should look like this:
Picture Source
The second axis is only for better readability and is corresponds to the primary axis with the relation:
primary=1/secondary
secondary=1/primary
What I am not able to do in excel-VBA (excel 2010) is the reciprocal second x-axis. There is no predefined axis scaling like this. There is xlScaleLinear and xlScaleLogarithmic for the property ScaleType of an axis. Is there a way to do this?
A secondary problem is that this:
Dim CH As Chart
Set CH = Tabelle2.ChartObjects(1).Chart
CH.ChartType = xlXYScatterLinesNoMarkers
With CH
.HasAxis(xlCategory, xlSecondary) = True
End With
Does not seem to work. Which means that a xyScatterplot does not seem to have a secondaryXaxis enabled.
I could try to add the lables and ticks myself using forms but this seems a little to much pain, I cannot be the only one who has encountered this problem.
Problem 1: How to format an axis reciprocal (1/x)?
Problem 1b: How to properly add a second x axis in a XYscatterplot?
You can do this by creating a fake axis using a series with data labels (inspired by https://peltiertech.com/secondary-axes-that-work-proportional-scales/):
Columns A and B are your data. Column C matches the X-ticks of your primary X-axis. Column D is =1/C2 etc and column E is the y-axis maximum for your chart. Now simply create a new series of columns C and E, format it to have no line and in this case I chose the + marker but you can create your own vertical line marker if you want it to be exact. Then add data labels set to range column D.
I don't think you'll find another way to do it without this hack, but it's really not that hard and doesn't require VBA which is always a plus in terms of readability / audibility of your workbook.
Another alternative would be to use the data labels to write the actual temperature to the data points:
Column C has the temperature in Celsius.
Since the Arrhenius plot is only defined as ln(k) against 1/T, this would be a good option I think.
I want to have strings like
X Y
Q1-07 2
Q2-07 6
Q3-07 8
Q4-07 6
Q1-08 1
on the X-axis in Excel. How can I see exact the 'Q1-07' etc. on the X-axis?
thanks
By its very nature, a scatter chart, or XY chart, has two numeric axes and numeric values for X and for Y. That's why it's called what it's called.
If you want categorical text values on the X axis, use a line chart. Line charts can be formatted to show just data markers, without any line in sight. The following screenshot shows a line chart with the series formatted to have no line, just markers.
I want to create an automated scatter plot. This is the first example table based on the step size I end up measuring A, B, C, D for a specific frequency. In this scatter plot I created manually you can see I want to plot C v/s A for a particular frequency.
But I need to do this automatically as based on the step size the number of row can change. Here, since the step size decreased the number of samples increased, and now the scatter plot needs to update number of A and C values it plots.
Is there a formula I can use without using any macros?
The relation between the step size and frequency is (number of samples of a single frequency = (360/step size)) so for a step size of 60 you will have in reality six entries of frequency 100 and six of 200 .
You can use formulas to define chart ranges if you hide the formulas in named ranges. Combine that with the fact that #N/A values are not plotted and you can get this to work without VBA.
For your example graph you could define two names ranges as follows:
Name: A_100
Refers To: =IF(Sheet1!$E$3:$E$100=100,OFFSET(Sheet1!$A$3,0,0,360/Sheet1!$B$1,1),NA())
and
Name: C_100
Refers To: =IF(Sheet1!$E$3:$E$100=100,OFFSET(Sheet1!$C$3,0,0,360/Sheet1!$B$1,1),NA())
Then set the X and Y axis of the chart to SheetName!A_100 and SheetName!C_100
The if statement filters out all the points not at frequency 100, if you have a formula for selecting the frequency replace "Sheet1!$E$3:$E$100=100" with that.
The offset function takes the first cell in the column and expands the number of rows according to your 360/step size formula.
I wish to customized the Y-axis to text instead on value.
Is there any way I can do it without any plugin?
Here will be my data:
A B C D
1 Lower Limit Upper Limit # Data
2 30S 40S A1234 30A
3 30S 40S A2345 30S
4 30S 40S A1256 30S
I wish my Y axis will be 30S, 30A, 40A, 40S intead of 10,20,30,40
and my X axis will be A1234,A2345,A1256
Is there any possible that I can change the X axis value?
I started with your data, and I added a small lookup table. I inserted a column "Value" (blue text) in your data range that has the Y value corresponding to the label in your "Data" column. You can use a lookup formula for this, for example, the formula in D2 is:
=INDEX($H$2:$H$5,MATCH(E2,$I$2:$I$5,0))
I made a column chart (don't know what type of chart you want, but this technique is widely applicable) using the yellow shaded range in the first data range (top left chart). I selected and copied the green shaded range in the second data range, selected the chart, and used Paste Special to add the data to the chart, using the settings shown in the dialog overlying the top right chart.
This has added another set of columns (bottom left chart), not so useful. I right-clicked the added series, picked Change Series Chart Type from the pop-up menu, and changed just this series to an XY scatter type (bottom right chart).
The XY scatter series is on the secondary axis, also not too useful. I formatted the XY series, and changed the axis to Primary (top left chart below). The 0.5 values in column G make the points line up with the vertical axis of the chart.
I added data labels to the XY series, shown in orange to distinguish them from the black axis labels (top right chart below). I formatted the labels so they appear to the left of the points, and so they used the Value from Cells option, based on the labels in I2:I5 (middle left chart below). If you don't have Excel 2013, you don't have this option, but you could
Manually type the desired text into the labels.
Link each label to the desired cell: select the labels (one click), select the desired label (second click), type = in the formula bar, select the cell, press Enter, repeat for all labels.
Use a third-party add-in like Rob Bovey's free Chart Labeler from appspro.com.
I hid the default axis labels. You can select None for axis labels, and then resize the plot area to make room for the custom labels created above. But I used a custom number format for the axis, which consisted of several space characters enclosed in double quotes. See middle right chart below.
Finally I rescaled the vertical axis so its min and max were 0 and 40 and the major spacing was 10, I formatted the XY series to use no markers, and I changed the label font color back to Automatic (bottom chart).
When Excel determines the axis values it will use to represent your data in a chart, the values are 'evenly distributed'.
For Example:
If you plot the following series in an Excel Line Chart.
[0.22,0.33,0.44,0.55,0.66,0.77,0.88,0.99,1.1,1.21,1.32,1.43,1.54,1.65,1.76,1.87,1.98,2.09,2.2]
Excel determines that the y-axis values should be [0,0.5,1,1.5,2,2.5].
What technique or formula is used to determine these values ?
After doing some experiementing, I conclude that Excel:
1) It will keep the Y axis starting at zero unless you explicitly tell it otherwise
2) It will set the Y axis max one major tick higher than your largest value
3) The last part seems more arbitrary - it clearly has "preferred" units (.1, .2, .5, 1, 2, 5, 10, 50, 100, etc) that it will choose for the major tick. It will use the smallest preferred unit that will result in between 5 and 10 major ticks, meeting the requirements above.
Please have a look at:
Reasonable optimized chart scaling
And
Algorithm for "nice" grid line intervals on a graph
There are more questions like this.