chartT = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const stripsT_F = svg.append('g')
.attr("class", "strips")
.selectAll('rect')
.data(dataF)
.join('rect')
.attr('fill', '#000')
.attr('x', d => xStripsT_F(d.temp))
.attr('width', 1.5)
.attr('height', 1.5)
.attr("transform", `translate(${margin.left}, ${height - 2.5*margin.bottom})`)
svg.append("g")
.call(xStripsAxisT_F)
return svg.node()
}