added instructions

CMakeLists.txt

@@ -7,17 +7,17 @@ project(
   HOMEPAGE_URL "https://soblin.github.io/matplotlibcpp17/"
   )
 
-find_package(Python3 COMPONENTS Interpreter Development NumPy)
+find_package(Python3 COMPONENTS Interpreter Development REQUIRED)
 find_package(pybind11 REQUIRED)
 
 set(matplotlibcpp17_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/include")
 
 # gallery
 if(NOT DEFINED USE_GUI)
-  set(USE_GUI 0)
+  set(USE_GUI 1)
 endif()
 if(NOT DEFINED ADD_DEMO)
-  set(ADD_DEMO ON)
+  set(ADD_DEMO 1)
 endif()
 
 function(add_demo name path)
@@ -31,6 +31,7 @@ function(add_demo name path)
 endfunction()
 
 if(${ADD_DEMO})
+  find_package(Python3 COMPONENTS NumPy REQUIRED)
   find_package(xtensor REQUIRED)
   set(CMAKE_CXX_STANDARD 17)
   set(CMAKE_CXX_FLAGS "-Wall -g -DUSE_GUI=${USE_GUI}")
@@ -45,6 +46,7 @@ endif()
 
 
 # test
+enable_testing()
 if(NOT DEFINED DO_TEST)
   set(DO_TEST ON)
 endif()

README.md

@@ -11,14 +11,25 @@ It is supposed to provide the user with almost full access to matplotlib feature
 ## Dependencies
 
 - [pybind11](https://github.com/pybind/pybind11) >= 2.4.3
-  - `sudo apt install pybind11-dev`
+  - `sudo apt install pybind11-dev` (on Ubuntu20.04)
+  - or manual install
 - compatible with [matplotlib](https://matplotlib.org/stable/index.html) == 3.5.1
 - numpy for `mplot3d`
-- [xtensor](https://github.com/xtensor-stack/xtensor) == 0.24.0 (+ [xtl](https://github.com/xtensor-stack/xtl), for `gallery` demos)
+- ([xtensor](https://github.com/xtensor-stack/xtensor) == 0.24.0 + [xtl](https://github.com/xtensor-stack/xtl), only for `gallery` demos)
 
-## Usage
+## Installation
 
-Just add include path to `include` directory of this project.
+```bash
+$ mdkir build; cd build;
+$ cmake .. -DADD_DEMO=0 (-DCMAKE_INSTALL_PREFIX=<custom path>)
+$ make -j
+$ make install
+$ (make uninstall)
+```
+
+For using matplotlibcpp17 from CMakeLists.txt, see [hello_world](https://github.com/soblin/matplotlibcpp17/tree/master/hello_world) example.
+
+Or you could just add include path to `include` directory and compile your codes as descibed in [minimal example](#minimal-example).
 
 ## Syntax
 
@@ -148,13 +159,17 @@ From [gallery/artist_animation/random_walk.cpp](https://github.com/soblin/matplo
 
 ### build
 
+If you do not need to build the demos, use `-DADD_DEMO=0` (by default it is `1`).
+
 ```bash
-mkdir build; cd build; cmake .. ; make -j
+$ mkdir build; cd build
+$ cmake .. -DADD_DEMO={0, 1} -DUSE_GUI={0, 1}
+$ make -j
 ```
 
-If you want to see the demo with `plt.show()`, add `-DUSE_GUI=1` (by default it is `0`). Otherwise the executables will `plt.savefig()` to `gallery/images` directory.
+If you do not need to see the demo with `plt.show()`, use `-DUSE_GUI=0` (by default it is `1`). Otherwise the executables will `plt.savefig()` to `gallery/images` directory.
 
-`make <gallery directory name>` runs all executables under that directory.
+`make <gallery directory name>` runs all the executables under that directory.
 
 ```bash
 make lines_bars_and_markers