how to plot a bar groups figure with positive and negative values on the y-axis. ylim starts from -1e3 to 15 in matlab

You can create a bar groups figure with positive and negative values on the y-axis and set the ylim using MATLAB. Here's an example code:

main.m
% Sample data
data = [3, -2, 5; -4, 1, -6; 7, -8, 9; -10, 11, -12];

% Create bar groups figure
figure;
bar(data);

% Set ylim
ylim([-1e3, 15]);
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In this example, the data matrix represents the bar heights for each group. Positive values will be plotted above the x-axis, and negative values below the x-axis. The ylim function is used to define the y-axis limits, from -1e3 to 15.

You can modify the data matrix to fit your specific data, and adjust the y-axis limits (ylim) to suit your desired range.