Scatter plot with strings on x axis

Question

Roja Eliza 2022-5-23

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评论： Voss 2022-6-2

I want to plot a scatter plot with sampling sites on x axis like S1, s2 names and on y axis I want to plot concentration of various metals. Also I want to divide the plot into sections as in the figure. If I am using xline command then it is plotting a line on the sampling sites but I want the dividing line to be between s2and S3.for example here in the picture the dividing line is between j5 and ju1 Can anyone help?

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Answer 1

Voss 2022-5-23

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编辑：Voss 2022-5-23

在 MATLAB Online 中打开

sites = compose("%s%d",["J" "Ju" "P" "R" "S" "W"].',1:5).';

sites = sites(:);

sites([12 14]) = [];

n_sites_per_group = [5 5 3 5 5 5];

elements = ["Cr" "Ni" "Cu" "Zn" "Cd" "Pb"];

n_sites = numel(sites);

n_elements = numel(elements);

data = 1.25*randn(n_sites,n_elements)-2; % random data

colors = [ ...

0 0 1; ...

0 0.6 0; ...

1 0 0; ...

0.6 0.6 0; ...

0.6 0.6 0.6; ...

0.6 0.6 0];

markers = 'osd^+*';

hold on

lines = zeros(1,n_elements);

for ii = 1:n_elements

lines(ii) = line(1:n_sites,data(:,ii), ...

'LineStyle','none', ...

'Marker',markers(ii), ...

'Color',colors(ii,:), ...

'MarkerFaceColor',colors(ii,:), ...

'DisplayName',elements(ii));

end

x_edges = [0 0.5+cumsum(n_sites_per_group(1:end-1)) n_sites+1]

x_edges = 1×7

0 5.5000 10.5000 13.5000 18.5000 23.5000 29.0000

xline(x_edges(2:end-1),'Color',[0.4 0.4 0.4]);

text((x_edges(1:end-1)+x_edges(2:end))/2,5.8*ones(1,numel(n_sites_per_group)), ...

["Jezewo" "Jutrosin" "Pakoslaw" "Rydzyna" "Sroda" "Wrzesnia"], ...

'VerticalAlignment','top', ...

'HorizontalAlignment','center', ...

'FontWeight','bold', ...

'FontSize',8);

xlim(x_edges([1 end]));

ylim([-8 6]);

xlabel('Sampling site','FontWeight','bold');

ylabel('I_{geo}','FontWeight','bold');

set(gca(), ...

'Layer','top', ...

'Box','on', ...

'XTick',1:n_sites, ...

'XTickLabels',sites, ...

'TickLength',[0.005 0.005]);

y = (5:-1:0)+[0; 1; 1; 0];

x = repmat([0; 0; n_sites+[1; 1]],1,6);

c = repmat(linspace(0.5,0.95,6).',1,3);

p = patch( ...

'XData',x, ...

'YData',y, ...

'FaceColor','flat', ...

'FaceVertexCData',c, ...

'EdgeColor','none');

ch = get(gca(),'Children');

set(gca(),'Children',[ch(ch ~= p); p]);

legend(lines,'Location','SouthEast','NumColumns',2);

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Roja Eliza 2022-6-2

编辑：Roja Eliza 2022-6-2

I have 14 elements and my y values range between 1 to 30,000 (like 1.6, 290,13000 these kind). I cann't seem to get the code right. whenever I change the value the patch dissapers. I want to set the Y values in logarithmically increasing value

Voss 2022-6-2

@Roja Eliza Please start a new question explaining the situation, and include your code.

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Answer 2

dpb 2022-5-23

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<scatter> can take a categorical variable as an x variable in which case you can get the text labels automagically -- however, the x-axis then will be categorical and have only integral values of those categories that can be plotted on it.

Your options are to either use a numeric category number for x and the set the tick labels as wanted with <xticklabels> which lets you write any string desired at any tick.

You can then draw the vertical lines at any x value you wish between the integral tick values.