Grid Line Consistent with Ticks on Axis

Grid line consistent with ticks on axis

From ?grid description of the nx and ny arguments:

When NULL, as per default, the grid aligns with the tick marks on the
corresponding default axis (i.e., tickmarks as computed by axTicks)

plot (x = 1:10, y = rnorm (10, 5, 2)) 
grid (NULL,NULL, lty = 6, col = "cornsilk2") 

How to show tick marks and labels with grid line for the specific one on the X axis with Chart.js?

use this for your labels array:

labels: [["jan", 20], "", "", "", "", "", ["jul", 20], "", "", "", "", "", ["jan", 21]],

and this to your options object:

options: {
    scales: {
        xAxes: [{
            ticks: {
               callback: (label) => (label === "" ? null : label)
          }
      }]
    }
  }

will get the following result:

Since the tick marks are getting generated from the grid lines they dissapear too, dont know how you can fix that

How to make axes ticks in between grid lines in matplotlib?

You can set the minor ticks so that only 1 minor tick appears inbetween your major ticks. This is done using matplotlib.ticker.AutoMinorLocator. Then, set the gridlines to only appear at the minor ticks. You also need to shift your xtick positions by 0.5:

from matplotlib.ticker import AutoMinorLocator

np.random.seed(10)

x = range(10)
y = np.random.random(10)
plt.plot(x,y)
plt.xticks(np.arange(0.5,10.5,1), x)
plt.xlim(0,9.5)
plt.ylim(0,1)
minor_locator = AutoMinorLocator(2)
plt.gca().xaxis.set_minor_locator(minor_locator)
plt.grid(which='minor')

plt.show()

Edit: I'm having trouble getting two AutoMinorLocators to work on the same axis. When trying to add in another one for the y axis, the minor ticks get messed up. A work around I have found is to manually set the locations of the minor ticks using a matplotlib.ticker.FixedLocator and passing in the locations of the minor ticks.

from matplotlib.ticker import AutoMinorLocator
from matplotlib.ticker import FixedLocator
np.random.seed(10)

x = range(10)
y = np.random.random(10)
plt.plot(x,y)
plt.xticks(np.arange(0.5,10.5,1), x)
plt.yticks([0.05,0.15,0.25,0.35,0.45,0.55,0.65,0.75,0.85,0.95,1.05], [0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1])
plt.xlim(0,9.5)
plt.ylim(0,1.05)

minor_locator1 = AutoMinorLocator(2)
minor_locator2 = FixedLocator([0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1])
plt.gca().xaxis.set_minor_locator(minor_locator1)
plt.gca().yaxis.set_minor_locator(minor_locator2)
plt.grid(which='minor')

plt.show()

How to draw grid lines fir every ticks?

Drawing grid lines can be done using the tickSizeInner method of the axis. You don't need to specifically draw the grid lines as you do in your code.

Example:

d3.axisBottom(xScale).tickSizeInner(-height)

In your case, to include the padding, the above will change to:

d3.axisBottom(xScale).tickSizeInner(-(h-padding))

Snippet:

const dataSet = [  0,  10,  20,  30,  40,  50,  60,  70,  80,  90,  100];
const w = 1200;const h = 250;const padding = 20;const paddingYaxis = 50;
const xScale = d3.scaleLinear()               .domain([0,100])               .range([paddingYaxis, w - 10]);
const svg = d3.select('#costSquareGraph');  
const xAxis = d3.axisBottom(xScale)                .tickSizeInner(-(h-padding))                .tickPadding(5);
svg.append('g')  .attr('transform', 'translate(0,' + (h - padding) + ')')  .call(xAxis);  //.selectAll('.tick line').attr('y1', 3);

svg { width: 100%;
}
.tick line {  stroke: #CCC;}.cost-square-wrap {  width: 100%;}

<script src="https://d3js.org/d3.v5.min.js"></script>

    <div class="cost-square-wrap">   <svg id="costSquareGraph" viewbox="0 0 1200 250"></svg>   </div>

Align grid with ticks

Looks like abline is the answer:

mytime <- as.POSIXct("2015-08-20") + seq(0,by=3600,length.out=7*24)
plot(x=mytime,y=rnorm(7*24),xaxt="n")
ticks <- c(mytime[seq(1,by=12,to=length(mytime))],mytime[1]+7*24*3600)
axis(1, ticks, strftime(ticks, "%a %H:%M"))
grid(ny=NULL,nx=NA)
abline(v=ticks[seq(1,length(ticks),2)],lty="dotted",col="lightgray")

D3.js y- axis ticks and grid lines do not align

I created a fiddle.

that while I had to change a few things to account for no angular, but shows the axis gridlines and labels aligned. I moved everything into one g group is is then translated and the individual components are no longer translated.

Align grid() to plot ticks

You could use abline to draw grids. You can specify where the grids should be with h (for horizontal lines) and v (for vertical lines)

#Plot
plot(1:10,las=1,xaxp  = c(0, 10, 10),xlim=c(0,10), ylim=c(0,10))
#Add horizontal grid  
abline(h = c(0,2,4,6,8,10), lty = 2, col = "grey")
#Add vertical grid
abline(v = 1:10,  lty = 2, col = "grey")

Another workaround is to use axis where tck value is 1. With axis, you can specify where the grids should be with at

#Plot
plot(1:10,las=1,xaxp  = c(0, 10, 10),xlim=c(0,10), ylim=c(0,10))

#Add horizontal grid  
axis(2, at = c(0,2,4,6,8,10), tck = 1, lty = 2, col = "grey", labels = NA)

#Add vertical grid
axis(1, at = 1:10, tck = 1, lty = 2, col = "grey", labels = NA)

#Add box around plot
box()

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