/* * A demo of an various Excel chart data tools that are available via a * libxlsxwriter chart. * * These include Drop Lines and High-Low Lines. * * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org * */ #include "xlsxwriter.h" /* * Write some data to the worksheet. */ void write_worksheet_data(lxw_worksheet *worksheet, lxw_format *bold) { int row, col; uint8_t data[6][3] = { /* Three columns of data. */ {2, 10, 30}, {3, 40, 60}, {4, 50, 70}, {5, 20, 50}, {6, 10, 40}, {7, 50, 30} }; worksheet_write_string(worksheet, CELL("A1"), "Number", bold); worksheet_write_string(worksheet, CELL("B1"), "Batch 1", bold); worksheet_write_string(worksheet, CELL("C1"), "Batch 2", bold); for (row = 0; row < 6; row++) for (col = 0; col < 3; col++) worksheet_write_number(worksheet, row + 1, col, data[row][col] , NULL); } /* * Create a worksheet with examples charts. */ int main() { lxw_workbook *workbook = workbook_new("chart_data_tools.xlsx"); lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL); lxw_chart_series *series; /* Add a bold format to use to highlight the header cells. */ lxw_format *bold = workbook_add_format(workbook); format_set_bold(bold); /* Write some data for the chart. */ write_worksheet_data(worksheet, bold); /* * Chart 1. Example with High Low Lines. */ lxw_chart *chart = workbook_add_chart(workbook, LXW_CHART_LINE); /* Add a chart title. */ chart_title_set_name(chart, "Chart with High-Low Lines"); /* Add the first series to the chart. */ chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$B$2:$B$7"); chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$C$2:$C$7"); /* Add high-low lines to the chart. */ chart_set_high_low_lines(chart, NULL); /* Insert the chart into the worksheet. */ worksheet_insert_chart(worksheet, CELL("E2"), chart); /* * Chart 2. Example with Drop Lines. */ chart = workbook_add_chart(workbook, LXW_CHART_LINE); /* Add a chart title. */ chart_title_set_name(chart, "Chart with Drop Lines"); /* Add the first series to the chart. */ chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$B$2:$B$7"); chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$C$2:$C$7"); /* Add drop lines to the chart. */ chart_set_drop_lines(chart, NULL); /* Insert the chart into the worksheet. */ worksheet_insert_chart(worksheet, CELL("E18"), chart); /* * Chart 3. Example with Up-Down bars. */ chart = workbook_add_chart(workbook, LXW_CHART_LINE); /* Add a chart title. */ chart_title_set_name(chart, "Chart with Up-Down bars"); /* Add the first series to the chart. */ chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$B$2:$B$7"); chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$C$2:$C$7"); /* Add Up-Down bars to the chart. */ chart_set_up_down_bars(chart); /* Insert the chart into the worksheet. */ worksheet_insert_chart(worksheet, CELL("E34"), chart); /* * Chart 4. Example with Up-Down bars with formatting. */ chart = workbook_add_chart(workbook, LXW_CHART_LINE); /* Add a chart title. */ chart_title_set_name(chart, "Chart with Up-Down bars"); /* Add the first series to the chart. */ chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$B$2:$B$7"); chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$C$2:$C$7"); /* Add Up-Down bars to the chart, with formatting. */ lxw_chart_line line = {.color = LXW_COLOR_BLACK}; lxw_chart_fill up_fill = {.color = 0x00B050}; lxw_chart_fill down_fill = {.color = LXW_COLOR_RED}; chart_set_up_down_bars_format(chart, &line, &up_fill, &line, &down_fill); /* Insert the chart into the worksheet. */ worksheet_insert_chart(worksheet, CELL("E50"), chart); /* * Chart 5. Example with Markers and data labels. */ chart = workbook_add_chart(workbook, LXW_CHART_LINE); /* Add a chart title. */ chart_title_set_name(chart, "Chart with Data Labels and Markers"); /* Add the first series to the chart. */ series = chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$B$2:$B$7"); chart_add_series( chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$C$2:$C$7"); /* Add series markers. */ chart_series_set_marker_type(series, LXW_CHART_MARKER_CIRCLE); /* Add series data labels. */ chart_series_set_labels(series); /* Insert the chart into the worksheet. */ worksheet_insert_chart(worksheet, CELL("E66"), chart); /* * Chart 6. Example with Error Bars. */ chart = workbook_add_chart(workbook, LXW_CHART_LINE); /* Add a chart title. */ chart_title_set_name(chart, "Chart with Error Bars"); /* Add the first series to the chart. */ series = chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$B$2:$B$7"); chart_add_series( chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$C$2:$C$7"); /* Add error bars to show Standard Error. */ chart_series_set_error_bars(series->y_error_bars, LXW_CHART_ERROR_BAR_TYPE_STD_ERROR, 0); /* Add series data labels. */ chart_series_set_labels(series); /* Insert the chart into the worksheet. */ worksheet_insert_chart(worksheet, CELL("E82"), chart); /* * Chart 7. Example with a trendline */ chart = workbook_add_chart(workbook, LXW_CHART_LINE); /* Add a chart title. */ chart_title_set_name(chart, "Chart with a Trendline"); /* Add the first series to the chart. */ series = chart_add_series(chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$B$2:$B$7"); chart_add_series( chart, "=Sheet1!$A$2:$A$7", "=Sheet1!$C$2:$C$7"); /* Add a polynomial trendline. */ lxw_chart_line poly_line = {.color = LXW_COLOR_GRAY, .dash_type = LXW_CHART_LINE_DASH_LONG_DASH}; chart_series_set_trendline(series, LXW_CHART_TRENDLINE_TYPE_POLY, 3); chart_series_set_trendline_line(series, &poly_line); /* Insert the chart into the worksheet. */ worksheet_insert_chart(worksheet, CELL("E98"), chart); return workbook_close(workbook); }