[doc] add installation instructions

Author: fangq

README.md

@@ -5,8 +5,8 @@
 * Copyright (C) 2019,2022,2025  Qianqian Fang <q.fang at neu.edu>
 * License: GNU General Public License version 3 (GPL v3) or 3-clause BSD license, see LICENSE*.txt
 * Version: 0.9 (code name: Daseot - Korean 5)
-* URL: http://github.com/NeuroJSON/easyh5
-* Compatibility: MATLAB R2010b or newer
+* URL: https://github.com/NeuroJSON/easyh5
+* Compatibility: MATLAB R2010b or newer and GNU Octave 5.0 or newer
 * Acknowledgement: This project is supported by US National Institute of Health (NIH)
   grant [U24-NS124027 (NeuroJSON)](https://reporter.nih.gov/project-details/10308329)
 
@@ -46,11 +46,23 @@ below.
 
 The EasyH5 toolbox can be installed using a single command
 ```
-    addpath('/path/to/easyh5');
+  addpath('/path/to/easyh5');
 ```
 where the `/path/to/easyh5` should be replaced by the unzipped folder
 of the toolbox (i.e. the folder containing `loadh5.m/saveh5.m`).
 
+In v0.8 and newer releases, EasyH5 supports GNU Octave 5.x or later.
+In order to use EasyH5 with Octave, one must install a toolbox named oct-hdf5
+by running the following command in Octave once
+```
+  pkg install https://github.com/fangq/oct-hdf5/archive/refs/heads/main.zip
+  pkg load oct-hdf5
+```
+
+EasyH5 supports MATLAB R2010b or newer. However, `saveh5` can not save empty
+arrays for MATLAB releases before 2015.
+
+
 ## Usage
 
 ### `saveh5` - Save a MATLAB struct (array) or cell (array) into an HDF5 file

jdatadecode.m

@@ -7,7 +7,7 @@
 % jsondecode for MATLAB R2016b or later)
 %
 % This function implements the JData Specification Draft 3 (Jun. 2020)
-% see http://github.com/NeuroJSON/jdata for details
+% see https://github.com/NeuroJSON/jdata for details
 %
 % authors:Qianqian Fang (q.fang <at> neu.edu)
 %
@@ -55,7 +55,7 @@
 % license:
 %     BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details
 %
-% -- this function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
+% -- this function is part of JSONLab toolbox (https://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
 %
 
 newdata = data;

jdataencode.m

@@ -6,13 +6,13 @@
 % jdata=jdataencode(data, 'Param1',value1, 'Param2',value2,...)
 %
 % Annotate a MATLAB struct or cell array into a JData-compliant data
-% structure as defined in the JData spec: http://github.com/NeuroJSON/jdata.
+% structure as defined in the JData spec: https://github.com/NeuroJSON/jdata.
 % This encoded form servers as an intermediate format that allows unambiguous
 % storage, exchange of complex data structures and easy-to-serialize by
 % json encoders such as savejson and jsonencode (MATLAB R2016b or newer)
 %
 % This function implements the JData Specification Draft 3 (Jun. 2020)
-% see http://github.com/NeuroJSON/jdata for details
+% see https://github.com/NeuroJSON/jdata for details
 %
 % author: Qianqian Fang (q.fang <at> neu.edu)
 %
@@ -69,7 +69,7 @@
 % license:
 %     BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details
 %
-% -- this function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
+% -- this function is part of JSONLab toolbox (https://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
 %
 
 if (nargin == 0)

mergestruct.m

@@ -16,7 +16,7 @@
 % license:
 %     BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details
 %
-% -- this function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
+% -- this function is part of JSONLab toolbox (https://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
 %
 
 if (~isstruct(s1) || ~isstruct(s2))

varargin2struct.m

@@ -19,7 +19,7 @@
 % license:
 %     BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details
 %
-% -- this function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
+% -- this function is part of JSONLab toolbox (https://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
 %
 
 len = length(varargin);