Could anyone help me how to save the bar graph in png format.

how to save the bar graph generated using

applyhatch(gcf,'|-+.\/')

in png while the command executes.

Answer 1

[DGM]

I'm not sure what you mean by "while the command executes", but...

An example:

y = [2 2 3; 2 5 6; 2 8 9; 2 11 12];
bar(y)
applyhatch(gcf,'|-/')
print('hatchedplot.png','-dpng')

[jaah navi]

please let me know what denotes -dpng in print('hatchedplot.png','-dpng').

[DGM]

That is the formattype string. It specifies that the output type is PNG.

See the list of strings for formattype:

https://www.mathworks.com/help/matlab/ref/print.html

[Walter Roberson]

The "-d" prefix stands for "driver". -dpng selects the driver named "png", which is responsible for outputting PNG image files.

[jaah navi]

thanks for your reply.

Answer 2

[Walter Roberson]

%applyhatch is a File Exchange Contribution. We need to install it to
%generate the graphics to demonstrate the save techniques
tn = tempname();
hatch_zip_file = 'https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/e5432c97-4a80-11e4-9553-005056977bd0/7e9c4240-31dc-444d-962b-4ca9dea813ab/packages/zip/hatchpattern.zip';
hz = tn + ".zip";
urlwrite(hatch_zip_file, hz);
cleanme = onCleanup(@() delete(hz));

hzf = tn + "_folder";
mkdir(hzf)
unzip(hz, hzf);
cleanme2 = onCleanup(@() delete(fullfile(hzf, '*')))

cleanme2 = 
  onCleanup with properties:

    task: @()delete(fullfile(hzf,'*'))

addpath(hzf)

fig = figure('name', 'original figure')

fig = 
  Figure (1: original figure) with properties:

      Number: 1
        Name: 'original figure'
       Color: [1 1 1]
    Position: [671 661 577 433]
       Units: 'pixels'

  Show all properties

bar(rand(5,20))
applyhatch(fig,'|-+.\/')

fig2 = setdiff(get(0,'children'), fig)

fig2 = 
  Figure (2) with properties:

      Number: 2
        Name: ''
       Color: [1 1 1]
    Position: [671 661 577 434]
       Units: 'pixels'

  Show all properties

satn = tn+"_saveas.png";
ptn = tn+"_print.png";
extn = tn+"_exportgraphics.png";
saveas(fig2, satn)
print(fig2, ptn)
exportgraphics(fig2, extn)

folder = fileparts(tn);
dir(fullfile(folder, '*.png'))

tpb156b592_d79a_4c5e_a88b_668e40e767eb_exportgraphics.png  tpb156b592_d79a_4c5e_a88b_668e40e767eb_saveas.png          
tpb156b592_d79a_4c5e_a88b_668e40e767eb_print.png           

You can see that all three png files were created.

imshow(extn)